Geology Sitemap - Page 5 2016-09-26

Tar Seep Sign, McKittrick, California
A sign points out an asphalt spring. Page 7.

Stratigraphic Sign, Big Horn Mountains, Wyoming
A road sign in Wyoming calls attention to a geological subject. Page 5.

Oil History in America - Fossil Fuels Photo Essay
America was a leader in exploiting oil in the 1850s. Page 18.

Bajada, California - Depositional Landform Pictures
Bajadas are a type of depositional landform. Page 2.

Bar, California - Depositional Landform Pictures
Bars are a type of depositional landform. Page 3.

Barrier Island, New Jersey - Depositional Landform Pictures
Barrier islands are a type of depositional landform. Page 4.

Beach, California - Depositional Landform Pictures
Beaches are a type of depositional landform. Page 5.

Delta, Alaska - Depositional Landform Pictures
Deltas are a type of depositional landform. Page 6.

Dune, California - Depositional Landform Pictures
Dunes in all their variety are depositional landforms. Page 7.

Floodplain, North Carolina - Depositional Landform Pictures
Floodplains are a type of depositional landform. Page 8.

Landslide, California - Depositional Landform Pictures
Landslides are a type of depositional landform. Page 9.

Lava Flow, Oregon - Depositional Landform Pictures
Lava flows can be classified as depositional landforms. Page 10.

Levee, Romania - Depositional Landform Pictures
Natural levees are a type of depositional landform. Page 11.

Mud Volcano, California - Depositional Landform Pictures
Mud volcanoes are classified as depositional landforms. Page 12.

Playa, California - Depositional Landform Pictures
Playas, dry lake beds, are a type of depositional landform. Page 13.

Spit, Washington - Depositional Landform Pictures
Spits are a type of depositional landform. Page 14.

Terrace, Oregon - Depositional Landform Pictures
Terraces are a type of depositional landform. Page 16.

Tombolo, California - Depositional Landform Pictures
Tombolos are a type of depositional landform. Page 17.

Tufa Towers, California - Depositional Landform Pictures
Tufa towers are a type of depositional landform. Page 18.

Volcano, California - Depositional Landform Pictures
Volcanoes are a type of depositional landform. Page 19.

Arroyo - Erosional Landforms
Arroyos are dry, steep-walled streambeds. Page 2.

Cirque - Erosional Landforms
Cirques are mountaiside bowls carved by glacial erosion. Page 7.

Cliff - Erosional Landforms
Cliffs are erosional landforms. Geology. Page 8.

Gorge - Erosional Landforms
Gorges are erosional landform types, a type of ravine. Page 10.

Gulch - Erosional Landforms
Gulches are an erosional landform type, a kind of ravine. Page 11.

Hanging Valley - Erosional Landforms
Hanging valleys are a type of erosional landform. Page 13.

Inselberg - Erosional Landforms
Inselbergs are a type of erosional landform. Page 17.

Monadnock - Erosional Landforms
Monadnocks are erosional landforms. Page 19.

Mountain - Erosional Landforms
Mountains are a quintessential erosional landform. Page 20.

Ravine - Erosional Landforms
Ravines are a basic erosional landform type. Page 21.

Sinkhole - Erosional Landforms
Sinkholes are a widespread erosional landform type. Page 23.

Valley - Erosional Landforms
A valley is a type of erosional landform. Page 26.

Fault Scarp, California - Tectonic Landforms
Fault scarps are a type of tectonic landform. Page 2.

Pressure Ridge, California - Tectonic Landforms
Pressure ridges are common tectonic landforms along transcurrent faults. Page 3.

Rift Valley, Uganda-Congo - Tectonic Landforms
Rift valleys are among the largest tectonic landforms. Page 4.

Sag Basin, California - Tectonic Landforms
Sag basins are tectonic landforms found along transcurrent faults. Page 5.

Shutter Ridge, California - Tectonic Landforms
Shutter ridges are common tectonic landforms along transcurrent faults. Page 6.

Stream Offset, California - Tectonic Landforms
Stream offsets are common signs of fault movement. Page 7.

Wash or Wadi - Erosional Landforms
Washes or wadis ar a type of erosional landform. Page 28.

Deep-Sea Chert, Plumas County - Ophiolitic Rocks Photo Gallery
Deep-sea rocks like chert are part of a typical ophiolite. Page 2.

Cumulate Gabbro, Close Up - Ophiolitic Rocks Photo Gallery
Details of a cumulate gabbro, part of a typical ophiolite. Page 16.

Diabase, Yuba County - Ophiolitic Rocks Photo Gallery
Diabase dikes and sills are part of a typical ophiolite. Page 8.

Chilled Dike Margin, Yuba County - Ophiolitic Rocks Photo Gallery
Chilled margins in sheeted dikes are part of a typical ophiolite. Page 10.

Ophiolitic Gabbro Outcrop, Yuba County - Ophiolitic Rocks Photo Gallery
Gabbro in an outcrop, part of a typical ophiolite. Page 13.

Ophiolitic Gabbro, Yuba County - Ophiolitic Rocks Photo Gallery
A thick gabbro layer is part of a typical ophiolite. Page 11.

Cumulate Gabbro, Yuba County - Ophiolitic Rocks Photo Gallery
Cumulate gabbro is part of a typical ophiolite. Page 15.

Peridotite Mantle, Trinity County - Ophiolitic Rocks Photo Gallery
Peridotite is part of a typical ophiolite. Page 17.

Ophiolitic Serpentinite, Siskiyou County - Ophiolitic Rocks Photo Gallery
Hard and colorful serpentinite from the Trinity ophiolite. Page 19.

Lava Pillow Section, San Luis Obispo County - Ophiolitic Rocks Photo Gallery
Split-open section of a lava pillow, part of a typical ophiolite. Page 4.

Badlands - Erosional Landforms
Badlands are a type of erosional landform. Page 3.

Butte - Erosional Landforms
Buttes are a type of erosional landform. Page 4.

Canyon - Erosional Landforms
Canyons are a type of erosional landform. Page 5.

Chimney - Erosional Landforms
Chimneys are a type of erosional landform. Page 6.

Cuesta - Erosional Landforms
Cuestas are a type of erosional landform. Page 9.

Gully - Erosional Landforms
Gullies are a type of erosional landform. Page 12.

Hogbacks - Erosional Landforms
Hogbacks are a type of erosional landform. Page 14.

Hoodoo - Erosional Landforms
Hoodoos are a type of erosional landform. Page 15.

Hoodoo Rock - Erosional Landforms
Hoodoo rocks are a type of erosional landform. Page 16.

Mesa - Erosional Landforms
Mesas are a type of erosional landform. Page 18.

Sea Arch - Erosional Landforms
Sea arches are a type of erosional landform. Page 22.

Tor - Erosional Landforms
Tors are a type of erosional landform. Page 25.

Volcanic Neck - Erosional Landforms
Volcanic necks are a type of erosional landform. Page 27.

Wave-Cut Platform - Erosional Landforms
Wave-cut platforms are a type of erosional landform. Page 30.

Yardang - Erosional Landforms
Yardang, in the gallery of erosional landform types. Page 31.

Shell Beach, California - Franciscan Matrix
Fragile shaly matrix of the Franciscan Complex is exposed at Shell Beach, on the Sonoma County coast north of San Francisco. Page 8.

Shell Beach, California - Peridotite
Shell Beach, on the Sonoma County coast north of San Francisco, contains occasional boulders of peridotite that escapes serpentinization. Page 21.

Shell Beach, California - Mammoth Rocks Stack, North Side
Structure of the Mammoth Rocks stack near Shell Beach, on the Sonoma County coast north of San Francisco. Page 24.

Shell Beach, California - Shell Beach Surf Boulder
A glaucous beach boulder shines in the afternoon sun at Shell Beach, on the Sonoma County coast north of San Francisco. Page 20.

Concretions, Nevada - Pictures of Sedimentary Structures
Concretions are a widespread sedimentary structure. Page 4.

Convolute Lamination, California - Pictures of Sedimentary Structures
Convolute lamination disturbs the bedding of sedimentary rocks. Page 5.

Flame Structure, California - Pictures of Sedimentary Structures
Flame structure helps indicate gravity and current directions in sedimentary rocks. Page 7.

Flute Casts, Mongolia - Pictures of Sedimentary Structures
Flute casts are widespread signs of geologic history in sedimentary rocks. Page 8.

Foreset Beds, Australia - Pictures of Sedimentary Structures
Foreset beds are laid down on a sloping surface. Page 9.

Gas-Escape Structures, Colorado - Pictures of Sedimentary Structures
Marks made by bubbles rising through sediment beds. Page 10.

Geopetal Structure, Wisconsin - Pictures of Sedimentary Structures
Geopetal structures are a reliable indicator of the horizontal direction in sedimentary rocks. Page 11.

Graded Bedding, California - Pictures of Sedimentary Structures
Graded bedding helps determine the vertical direction in sedimentary rocks. Page 12.

Hummocky Cross-Bedding, Utah - Pictures of Sedimentary Structures
Hummocky cross-bedding in sedimentary rocks is a sign of ancient storms. Page 13.

Imbrication, Nevada - Pictures of Sedimentary Structures
Imbrication is a stacking of grains according to the current. Page 14.

Lamination, California - Pictures of Sedimentary Structures
Lamination is the fine layering typical of many sedimentary rocks. Page 15.

Linear Ripples, New York - Pictures of Sedimentary Structures
Ripples are commonly preserved in sedimentary rocks. Page 16.

Load Casts, California - Pictures of Sedimentary Structures
Load casts form where heavy sediments press down on soft sediments. Page 17.

Mudcracks, California - Pictures of Sedimentary Structures
Mudcracks are a sure sign of subaerial exposure. Page 18.

Rip-Up Clasts, California - Pictures of Sedimentary Structures
Rip-up clasts in sedimentary rocks are signs of subsea avalanches. Page 21.

Scour-and-Fill Structures, California - Pictures of Sedimentary Structures
Scour-and-fill structures are signs of geologic history in sedimentary rocks. Page 22.

Stromatolitic Structure, Mongolia - Pictures of Sedimentary Structures
Bacteria or algae may leave stromatolitic structure in sedimentary rocks. Page 23.

Geologic Wine Labels - Aalenian Wine
Aalenian, from the Languedoc region, is named for an age of the Jurassic. Page 8.

Geologic Wine Labels - Chateau Silex Eloge Red Wine
Chateau Silex wine is grown in the Tertiary molasse around Nimes. Page 9.

Geologic Wine Labels - Devils Marbles Chardonnay
A south Australian wine honors a north Australian landmark. Page 6.

Geologic Wine Labels - Les Roches Bleues Wine
The blue metavolcanic rocks of the Cote de Brouilly add special character to this Beaujolais, Les Roches Bleues. Page 5.

Geologic Wine Labels - Rocks and Gravel by Edmunds St John
Rocks and Gravel is a Rhone-style blend that mimics the ideal vineyard.

Geologic Wine Labels - Syncline Syrah
Syncline Wine Cellars produces terroir-centered syrah. Page 2.

Dropstone, California - Pictures of Sedimentary Structures
A dropstone stands out in otherwise fine-grained sedimentary rocks. Page 6.

Pillar Structure, California - Pictures of Sedimentary Structures
A sign of fluid escape in sedimentary rocks. Page 19.

Bedding, California - Pictures of Sedimentary Structures
Bedding is the most common feature of sedimentary rocks. Page 2.

Channel Cast, California - Pictures of Sedimentary Structures
Channel casts are common sedimentary features in turbidites. Page 3.

Hydration Weathering of Obsidian - Chemical Weathering Gallery
Glassy obsidian weathers readily by hydration. Page 5.

Dissolution - Chemical Weathering Gallery
Dissolution weathering turns limestone and marble into dissolved ions. Page 4.

Differential Weathering - Chemical Weathering Gallery
Unweathered crystals hide in the alteration rind of a basalt cobble. Page 3.

Block Weathering - Mechanical or Physical Weathering Gallery
Block weathering turns solid rock into boulders. Page 3.

Talus or Scree - Mechanical or Physical Weathering Gallery
Talus is loose rock lying on a mountain slope. Page 12.

Cavernous Weathering - Mechanical or Physical Weathering Gallery
Cavernous weathering produces the large pits called tafoni. Page 4.

Salt Spray - Mechanical or Physical Weathering Gallery
A mist of saltwater moves ashore to weather rocks. Page 11.

Rock Flour - Mechanical or Physical Weathering Gallery
When glaciers grind rock exceeding fine. Page 10.

Grus - Mechanical or Physical Weathering Gallery
Natural gravel from crumbling granite. Page 8.

Honeycomb Weathering - Mechanical or Physical Weathering Gallery
Honeycomb weathering creates fine tafoni. Page 9.

Frost Heave - Mechanical or Physical Weathering Gallery
Freezing ground ice lifts and shifts sediment. Page 7.

Colluvium - Mechanical or Physical Weathering Gallery
Sediment carried downhill without running water. Page 5.

Alluvium - Mechanical or Physical Weathering Gallery
Alluvium is sediment handled by running water. Page 2.

Chemical Weathering and Joints - Chemical Weathering Gallery
Chemical weathering produces rounded boulders underground. Page 2.

Marble Sugaring - Chemical Weathering Gallery
Marble begins to dissolve in rainwater. Page 6.

Spheroidal Weathering of Basalt - Chemical Weathering Gallery
A lava flow weathers in onion-skin layers. Page 10.

Oxidation of Sulfides - Chemical Weathering Gallery
Sulfides are prone to oxidation at the Earth's surface. Page 8.

Palagonite Formation - Chemical Weathering Gallery
Palagonite forms by rapid hydrothermal alteration of glassy basalt. Page 9.

Slickensides or Fault Mirrors - Slickenside in Serpentinite
Serpentinite very commonly has slickensides. Page 6.

Slickensides or Fault Mirrors - Slickenside in Basalt
Slickenside in a basalt outcrop, Marin County California. Page 8.

Slickensides or Fault Mirrors - Closeup of Basalt Slickenside
Closeup of the fault-polished rock surface of a San Quentin basalt outcrop. Page 9.

Slickenside in Limestone
A limestone boulder displays a small slickenside. Page 3.

Slickensides or Fault Mirrors - Slickenside in Serpentinite Outcrop
A fault-polished rock surface or slickenside in a serpentinite outcrop. Page 7.

Lava Bomb - Volcanic Rocks
A very large lava bomb from Krakatau. Page 25.

Andesite from La Soufriere - Volcanic Rocks
Porphyritic andesite from la Soufriere volcano, St Vincent, Antilles. Page 5.

Tuff Outcrop - Volcanic Rocks
A thick bed of tierra blanca tuff in El Salvador. Page 23.

Perlite - Volcanic Rocks
Detail of perlite showing glassy surface. Page 9.

Peridotite and Serpentine Colors, California - Pictures of Peridotite
Peridotite is dull, but serpentinite may give it glam. Page 9.

Serpentinite Rind on Peridotite, California - Pictures of Peridotite
Peridotite boulder with a rind of serpentinite. Page 7.

Peridotite Outcrop, California - Pictures of Peridotite
Peridotite. Geology. Page 5.

Peridotite Bald, California - Pictures of Peridotite
Peridotite peaks may be entirely barren. Page 11.

Weathered Peridotite Hand Specimen, California - Pictures of Peridotite
Peridotite. Geology. Page 6.

Oxidation in Ultramafic Rocks - Chemical Weathering Gallery
Peridotite and its siblings are especially prone to rust. Page 7.

Slickenside in Metabasalt, Isle Royale, Michigan - Slickensides or Fault Mirrors
Slickenside in metabasalt on Isle Royale, Michigan. Page 10.

Slickenside in Peridotite, Klamath Mountains, California - Slickensides or Fault Mirrors
Slickenside or fault-polished rock surface in peridotite of the Klamath Mountains. Page 5.

Slickenside in Sandstone, Wright's Beach, California - Slickensides or Fault Mirrors
Slickenside in sandstone at Wright's Beach, California. Page 4.

Spheroidal Weathering in Mudstone - Chemical Weathering Gallery
Spheroidal weathering affects a massive mudstone along the Eel River, California. Page 11.

Igneous Rock Textures - Poikilitic Texture
Poikilitic texture shown in a feldspar phenocryst. Page 5.

Obsidian Picture Gallery - Obsidian Flow Texture
Complex flow textures of an obsidian flow. Page 3.

Obsidian Picture Gallery - Obsidian Blocks
The blocky surface of an obsidian flow. Page 2.

Obsidian Gallery - Obsidian Cobble
A cobble of slightly weathered obsidian. Page 6.

Obsidian Gallery - Obsidian Hydration Rind
Hydration puts a frosty coat on this obsidian specimen. Page 7.

Obsidian Picture Gallery - Obsidian Tools
Obsidian makes the best stone tools. Page 10.

Obsidian Picture Gallery - Spherulites in Obsidian
Spherulites are balls of minerals that occur in obsidian. Page 4.

Assorted Oregon Obsidian Gallery - Pictures of Obsidian
Some of the variety of the obsidian from Glass Buttes, central Oregon. Page 11.

Weathering of Obsidian, Glass Buttes Oregon - Obsidian Gallery - Pictures of Obsidian
An obsidian cobble displays a coating of white weathered material. Page 8.

Internal Structure - Obsidian Gallery - Pictures of Obsidian
Weathering etches into the delicate internal structure of an obsidian cobble. Page 9.

Uinta Mountains, Utah - Stereoscopic Images
Visualize the western Uinta Mountains in three dimensions with photo stereopairs. Page 3.

Petroglyph Canyon, Valley of Fire, Nevada - Stereoscopic Images
Stereopair from Valley of Fire State Park, Nevada. Page 4.

Dinosaur Ridge, Morrison, Colorado - Ripple Closeup
Ripples at Dinosaur Ridge National Natural Landmark near Denver, Colorado. Page 2.

Dinosaur Ridge, Morrison, Colorado - Crocodilian Trackmarks
Prehistoric crocodiles or swimming dinosaurs left marks at Dinosaur Ridge National Natural Landmark near Denver, Colorado. Page 3.

Dinosaur Ridge, Morrison, Colorado - Burrows and Trackmarks
Fossil burrows and trackmarks from Dinosaur Ridge National Natural Landmark near Denver, Colorado. Page 4.

Dinosaur Ridge, Morrison, Colorado - Dinosaur Tracks
Tracks of large dinosaurs at Dinosaur Ridge National Natural Landmark near Denver, Colorado. Page 5.

Dinosaur Ridge, Morrison, Colorado - Dinosaur Trackway
Dinosaur trackway at Dinosaur Ridge National Natural Landmark near Denver, Colorado. Page 6.

Dinosaur Ridge, Morrison, Colorado - Dinosaur Freeway
Dinosaur trackways at Dinosaur Ridge National Natural Landmark near Denver, Colorado. Page 7.

Dinosaur Ridge, Morrison, Colorado - Morrison Formation
The Morrison Formation at Dinosaur Ridge National Natural Landmark near Denver, Colorado. Page 8.

Dinosaur Ridge, Morrison, Colorado - Apatosaurus Footprint
Photos from Dinosaur Ridge National Natural Landmark near Denver, Colorado. Page 9.

Dinosaur Ridge, Morrison, Colorado - Apatosaurus Footprint Underside
Deep footprints at Dinosaur Ridge National Natural Landmark near Denver, Colorado. Page 10.

Dinosaur Ridge, Morrison, Colorado - Dinosaur Bone
A dinosaur bone at Dinosaur Ridge National Natural Landmark near Denver, Colorado. Page 11.

Dinosaur Ridge, Morrison, Colorado - Dinosaur Bone Closeup
Closeup of dinosaur bone at Dinosaur Ridge National Natural Landmark near Denver, Colorado. Page 12.

Fossils of Triceratops Trail, Golden Colorado - Small Burrows and Trails
Small trace fossils at Triceratops Trail. Page 6.

Fossils of Triceratops Trail, Golden Colorado - Leaf Impression
A small leaf impression is preserved at Triceratops Trail. Page 7.

Geologists' Pet Rocks and Favorite Stones - Septarian Nodule
This brain-resembling septarian nodule is one person's pet rock. Page 7.

Geologists' Pet Rocks and Favorite Stones - Chert Bomb
For lack of a better term, I call this pet rock a chert bomb. Page 6.

Hazardous Plants Gallery - Poodle-Dog Bush
Turricula parryi, poodle-dog bush, is a nasty plant of Southern California. Page 14.

Hazardous Plants Gallery - Fragrant Sumac, Not Poison Oak or Poison Ivy
Rhus aromatica looks very much like poison oak but is harmless. Page 15.

Blue Slag - Gallery of Artificial Rocks
Slag can take on many colors, like this sky blue. Page 23.

Concrete Bridge - Gallery of Artificial Rocks
A concrete bridge across a gully was cast in place. Page 16.

Patented Granolithic Concrete - Gallery of Artificial Rocks
Concrete mixes were novel and patentable in the 1800s. Page 14.

Inside a Lime Kiln - Gallery of Artificial Rocks
Inside the fire chamber of an old lime kiln. Page 4.

Mother-of-Pearl in Concrete - Gallery of Artificial Rocks
Concrete made decorative with mother-of-pearl. Page 18.

Concrete Sidewalk Cross Section - Gallery of Artificial Rocks
A beveled concrete sidewalk reveals its aggregate interior. Page 11.

Travertine Quarry, Turkey - Travertine Picture Gallery
Travertine is quarried in Denizli province, Turkey. Page 4.

Travertine of the Getty Center - Travertine Picture Gallery
This popular destination is a showplace of travertine. Page 5.

Fossils in Travertine - Travertine Picture Gallery
Travertine is often full of fossils. Page 6.

Travertine Springs, Turkey - Travertine Picture Gallery
Spectacular travertine springs in Turkey's Denizli province. Page 3.

Granite Tors near Benton, California - Stereoscopic Images
Stereopair of granite tors east of Mono Lake, California. Page 5.

Scarlet's Jasper - Geologists' Pet Rocks and Favorite Stones
Scarlet has kept this chert pebble for 35 years. Page 9.

Geologists' Pet Rocks and Favorite Stones - Thomsonite Boulder
A thomsonite-bearing boulder is one person's pet rock. Page 8.

Travertine Spring, California - Travertine Picture Gallery
Travertine builds up at a Sierra Nevada spring. Page 2.

Limestones - Calcite Crystals in Limestone, New York
Recrystallization in a New York limestone. Page 12.

Geologic Photography Tips - Touching Up Midday Photos
Increasing contrast and color saturation may help midday photographs. Page 7.

Geologic Photography Tips - Dealing With Midday Photos
Photos taken during midday may lack contrast. Page 6.

Geologic Photography Tips - Closeups in Daylight
For mineral and rock portraits, bright light isn't enough. Page 8.

Geologic Photography Tips - Using Backlight in Daylight
Backlight is usually helpful in daylight rock or mineral portraits. Page 9.

Geologic Photography Tips - Color Adjustment in Indoor Photo
Indoor photos are improved in software. Page 14.

Geologic Photography Tips - Adjusting Color in Indoor Photos
Indoor photos of rocks and minerals may need brightening and color adjustment. Page 13.

Geologic Photography Tips - Background Color - Buff
Warm background hues are good for colored stones and minerals. Page 12.

Geologic Photography Tips - Background Color - Gray
Neutral gray background is good for dark specimens. Page 11.

Geologic Photography Tips - Background Color - White
White backgrounds serve light-colored geologic subjects. Page 10.

Geologic Photography Tips - Indicating Scale from Foreground
Suggesting scale in a landscape photo through foreground objects. Page 15.

Geologic Photography Tips - Indicating Scale with Hammer
A rock hammer is a common indicator of scale in geologic photos. Page 16.

Geologic Photography Tips - Beware of High Contrast
The eye deals with contrast better than the camera. Page 2.

Geologic Photography Tips - Diffuse Lighting
Cloudy days can be the best for photographing geologic subjects. Page 5.

Geologic Photography Tips - Indicating Scale with Coins
Coins are a common way to show scale in closeup photos. Page 18.

Geologic Photography Tips - Beware Low-Contrast Aerial Photos
Aerial photos tend to suffer from low contrast. Page 3.

Geologic Photography Tips - Low Contrast Compensated
Aerial photos can sometimes be fixed. Page 4.

Sedimentary Rock Gallery - Massive Sandstone in Outcrop
Sandstone in an Oakland quarry wall. Page 13.

Eclogite Closeup, Sonoma County, California - Eclogite Picture Gallery
Eclogite boulder from Armstrong Redwoods State Park. Page 3.

Eclogite Boulder, Sonoma County, California - Eclogite Picture Gallery
Eclogite caught and released in a state park. Page 4.

Boulder Conglomerate
Conglomerates may be built of boulders as well as pebbles. Page 4.

Garnet in Eclogite, Sonoma County, California - Porphyroblast Gallery
Garnet forms porphyroblasts in eclogite. Page 3.

Garnet in Gneiss, New York - Porphyroblast Gallery
Garnet forms porphyroblasts in gneiss. Page 4.

Garnet in Schist, Alaska - Porphyroblast Gallery
Garnet forms a porphyroblast in schist. Page 5.

Kyanite in Schist - Porphyroblast Gallery
Kyanite forms porphyroblasts in schist. Page 6.

Pyrite in Marble, Sierra Nevada Foothills, California - Porphyroblast Gallery
Pyrite forms porphyroblasts in marble. Page 7.

Pyrite in Phyllite, Vermont - Porphyroblast Gallery
Pyrite forms porphyroblasts in phyllite. Page 8.

Pyrite in Slate - Porphyroblast Gallery
Pyrite forms porphyroblasts in a slate paver. Page 9.

Stromatolite from Itasca County, Minnesota
A spectacular stromatolite from Proterozoic rocks in Minnesota. Page 10.

Stromatolite in Mauritania
Stromatolites eroded in Mauritanian limestone. Page 8.

Fossil Wood Gallery - Petrified Wood Factory in Indonesia
A logyard of fossilized wood in Indonesia. Page 12.

Fossil Wood Gallery - Fossil Tree Trunk in Montana
A fossilized tree trunk near Lindsay, Montana. Page 10.

Fossil Wood Gallery - Fossil Tree Trunk, Zimbabwe
Fossilized wood from Zimbabwe has a bluish-green color. Page 11.

Fossil Wood Gallery - Petrified Wood, Panoche Hills, California
Fossilized wood from the latest Cretaceous of Panoche Hills, California. Page 3.

Fossil Wood Gallery - Petrified Wood, Panoche Hills, California, Cretaceous
Fossilized wood from Panoche Hills, Fresno County, California. Page 2.

Fossil Wood Gallery - Petrified Wood from Northern Wyoming
Fossilized wood from northern Wyoming. Page 4.

Fossil Wood Gallery - Closeup of Petrified Wood from Wyoming
Fossilized wood from Wyoming displays crystalline quartz. Page 5.

Fossil Wood Gallery - Closeup of Wyoming Wood Fossil
Fossilized wood from Wyoming glitters in the light. Page 6.

Quartzite - Metamorphic Rock Gallery
Closeup of quartzite, in the metamorphic rocks gallery. Page 17.

Phyllite - Slaty Cleavage in Phyllite
Phyllite displays its slaty cleavage in outcrop. Page 3.

Serpentinite Gallery - Bastite, Serpentinitized Pyroxene
Bastite is the name given to pyroxene replaced by serpentine. Page 7.

Serpentinite Gallery - Vermont Serpentinite
Serpentinite from a former terrane suture in Vermont. Page 8.

Serpentinite Gallery - Serpentine Ground
Serpentinite makes for a surreal groundscape. Page 19.

Serpentinite Gallery - Serpentinite Outcrop, Ring Mountain Preserve, California
A dramatic slab of serpentinite and related rocks at Ring Mountain Preserve. Page 13.

Serpentinite Gallery - Verd Antique or Serpentine Marble
The luscious green marble of builders is a serpentinite. Page 6.

Slate - Slate Building Stone
Slate can be used structurally as well as decoratively. Page 10.

Slate - Waste Pile at a Slate Quarry
Slate production creates a large amount of waste rock. Page 6.

Slate - Scrap Heap of Slate
Slate can be repurposed, but most quarry product is still waste. Page 7.

Slate - Quarry in the Slate Valley
Slate is widely quarried in the New York - Vermont border region. Page 5.

Cone Penetrometer Testing or CPT - CPT Sensors
Cone penetrometer testing relies on two sensors. Page 3.

Cone Penetrometer Testing or CPT - CPT Cone Tip
Cone penetrometer testing relies on this steel instrument. Page 2.

Cone Penetrometer Testing or CPT - Sending the Cone Down
The cone penetrometer is sent down into the ground. Page 4.

Cone Penetrometer Testing or CPT - Grouting a CPT Hole
A cone penetrometer hole is grouted after test completion. Page 6.

Cone Penetrometer Testing or CPT - Withdrawing the CPT Pipe
A cone penetrometer pipe is retrieved from the ground. Page 5.

Slate - Field Exposure of Slate
Slate protrudes above a Sierra Nevada slope. Page 4.

Fossil Wood Gallery - Gilboa Petrified Forest, Devonian, New York
Fossilized tree trunks at Gilboa, New York, are the world's oldest known trees. Page 8.

Geophone and Spread Line - Seismic Refraction Method
A geophone is deployed along the spread line for a seismic refraction recording. Page 4.

Geophones - Seismic Refraction Method
Geophones are used to collect data on a seismic refraction line. Page 3.

The Seismic Refraction Line - Seismic Refraction Method
A field crew lays out a seismic refraction line. Page 2.

Ready at a Shotpoint - Seismic Refraction Method
A shooter stands at a shotpoint on a seismic refraction line. Page 7.

Seismic Impinger Sledgehammer - Seismic Refraction Method
A wired sledgehammer serves as an impinger for a seismic refraction study. Page 5.

Shotpoint Plate - Seismic Refraction Method
An impinger plate is ready for action along a seismic refraction line. Page 6.

Identifying Native Metals by Streak
Three native metals, gold, platinum and copper, identified by streak. Page 4.

Identifying Cinnabar and Hematite by Streak
Streak colors are distinctive for cinnabar and hematite. Page 5.

Identifying Galena by Streak
Galena's streak differentiates it from hematite. Page 6.

Identifying Magnetite by Streak
Magnetite has a black streak. Geology. Page 7.

Identifying Copper Sulfide Minerals by Streak
Copper sulfide minerals have very similar streaks. Page 8.

Mineral Streak Tests - Beware of Scratches
Some minerals, like corundum, are harder than the streak plate. Page 3.

Typical White Mineral Streak
Most minerals have a white streak. Page 2.

Lakeview Gusher - Scene of the Lakeview Gusher
Site of America's most spectacular oil gusher. Page 2.

Lakeview Gusher - View Out the Horseshoe
The scene from the scene of the great gusher of 1910. Page 11.

Lakeview Gusher - Gusher Site and Monument
Monument at the site of America's most spectacular oil gusher. Page 3.

Lakeview Gusher - Oil-Soaked Sand
Accidental asphalt pavement from the Lakeview gusher. Page 4.

Lakeview Gusher - Center of the Well
An iron pipe stand at the center of America's greatest gusher. Page 5.

Lakeview Gusher - Northern Rampart
Visit the site of America's most spectacular oil gusher a hundred years later. Page 6.

Lakeview Gusher - Retaining Wall
Visit the site of America's most spectacular oil gusher a hundred years later. Page 7.

Lakeview Gusher - Asphalt on the Ramparts
Asphalt and sand top the berm at the Lakeview gusher site. Page 8.

Lakeview Gusher - Asphalt Flows
Crude oil mimicked lava during the 1910 Lakeview gusher and afterwards. Page 9.

Lakeview Gusher - Asphalt Lake Beds
Silt combines with crude oil at the Lakeview gusher site. Page 10.

Fulgurite Pictures - Fulgurite Wormhole
View of the end of a sand fulgurite. Page 2.

Ground-Penetrating Radar - Gathering Data
A crew gathers ground-penetrating radar data in the field. Page 5.

Slickensides or Fault Mirrors - Slickenside in Chert at Corona Heights, San Francisco
Spectacular slickenside at Corona Heights, San Francisco. Page 11.

Slickensides or Fault Mirrors - Polished Chert Slickenside
Polished chert on the Corona Heights slickenside, San Francisco. Page 16.

Slickensides or Fault Mirrors - Chert Reflections
A gallery of photos showing slickensides, fault-polished rock surfaces. Page 17.

Slickensides or Fault Mirrors - Rock Near a Slickenside
Undisturbed chert near the Corona Heights slickenside, San Francisco. Page 14.

Slickensides or Fault Mirrors - Corona Heights Slickenside, Beaver Street
Fault-polished rock surface at Corona Heights, San Francisco. Page 12.

Slickensides or Fault Mirrors - Slickenside in the French Alps
Slickenside on the Vuache fault, French Alps. Page 18.

Slickensides or Fault Mirrors - Slickenside at Arm's Length
Medium shot of the slickenside at Corona Heights, San Francisco. Page 15.

Slickensides or Fault Mirrors - Slickenlines
Slickenlines are arrows of fault motion. Page 13.

Adobe Bricks - Gallery of Artificial Rocks
Adobe bricks in Old Town San Diego State Park. Page 2.

Greenstone Outcrop - Metamorphic Rock Gallery
A spectrum of metamorphic rocks, the pelitic sequence and the basaltic sequence. Page 23.

Metaquartzite - Metamorphic Rock Gallery
Quartzite with its original sand grains erased is called metaquartzite. Page 19.

Green Chert - Metamorphic Rock Gallery
Metamorphosed chert turns green on a Marin County beach. Page 14.

Serpentinite Gallery - Serpentinite Cliffs, Baker Beach, San Francisco
Serpentinite cliffs above Baker Beach, San Francisco. Page 17.

Serpentinite Gallery - Serpentinite, Ring Mountain Preserve
A closeup of high-grade serpentinite at the Ring Mountain Preserve. Page 3.

Serpentinite Gallery - Serpentine Barren at Ring Mountain, California
Treeless terrain underlain by serpentinite at Ring Mountain, California. Page 20.

Serpentinite Gallery - Serpentinite Hand Specimen, Sierra Nevada
A hand specimen of very dark serpentinite. Page 10.

Serpentinite Gallery - Serpentinite Exhibit, Regional Parks Botanic Garden
A teaching gallery of these interesting, important and sexy rocks. Page 21.

Serpentinite Gallery - Serpentinite from Idria Ultramafic Body
Serpentinite of the Idria ultramafic body is a bright blue-green. Page 2.

Serpentinite Gallery - Serpentinite Outcrop, Oakland Hills
Serpentinite slope in the Oakland Hills, California. Page 15.

Serpentinite Gallery - Serpentinite Cross-Section, Oakland Hills
A backyard cut displays the guts of a serpentinite bodyA clean cut into the slope behind a house exposes the fluid internal shapes of a serpentinite body. Serpentinite is more easily deformed than most rocks.. Page 16.

Serpentinite Gallery - Serpentinite, Feather River Ultramafic Complex, California
Mottled green serpentinite in the Sierra Nevada. Page 12.

Serpentinite Gallery - Light and Dark Serpentinite, Sierra Nevada
Light and dark serpentinite at the same locality. Page 11.

Metaconglomerate - Metamorphic Rock Gallery
Metamorphosed conglomerate with its sedimentary features still visible. Page 18.

Mud Volcanoes - Gryphons of Salton Sea Geothermal System
A field of gryphons near the Salton Sea, California. Page 4.

Mud Volcanoes - Hydrocarbon Mud Volcano
Hydrocarbon mud volcano, one of the four basic types of mud volcano. Page 3.

Mud Volcanoes - Dual-Type Mud Volcano, Andaman Islands
Mud volcano of mixed origin from the Andaman Islands. Page 7.

Mud Volcanoes - Hydrothermal Mud Volcano
Hydrothermal mud volcanoes are one of the four basic types of mud volcano. Page 2.

Mud Volcanoes - Fluids from Mud Volcanoes
Brines from the hydrothermal mud volcanoes near the Salton Sea, California. Page 5.

Mud Volcanoes - Secondary Mud Volcanoes, Andaman Islands
Small mud volcanoes formed in response to large ones. Page 8.

Mud Volcanoes - Serpentinite Mud Volcano
Tectonic mud volcano from California's former subduction zone, one of the four basic types of mud volcano. Page 6.

Baker Beach Serpentinite - Metamorphic Rock Gallery
Serpentinite of North Baker Beach and the Golden Gate. Page 27.

Altered Chert - Metamorphic Rock Gallery
Chert can be metamorphosed. Geology. Page 15.

Polished Serpentinite - Metamorphic Rock Gallery
Serpentinite is polished by the surf at Jenner, California. Page 25.

Blueschist Closeup - Metamorphic Rock Gallery
Planar surface of blueschist. Geology. Page 33.

Blueschist - Metamorphic Rock Gallery
Blueschist closeup. Geology. Page 32.

Schist in Sculpture - Metamorphic Rock Gallery
An ancient Buddha is carved from schist. Page 8.

Jadeitic Chert - Metamorphic Rock Gallery
High pressures convert siliceous mudstone to a jadeitic chert. Page 16.

Chrysotile Vein - Metamorphic Rock Gallery
A 2-centimeter-thick vein of chrysotile, close up. Page 29.

New Idria Chrysotile - Metamorphic Rock Gallery
Flaky chrysotile on a serpentinite specimen from the New Idria mining district. Page 30.

Chrysotile Rock - Metamorphic Rock Gallery
Serpentinite may contain chrysotile like this specimen. Page 28.

Contact Metamorphism - Metamorphic Rock Gallery
The Purcell Sill roasts the adjoining limestone into marble. Page 36.

Eclogite Outcrop - Metamorphic Rock Gallery
Outcrop of eclogite at Jenner, California. Page 35.

Eclogite Specimen - Metamorphic Rock Gallery
Hand specimen of eclogite. Geology. Page 34.

Garnet Gneiss - Metamorphic Rock Gallery
A garnet gneiss from upstate New York. Page 11.

Pinto Gneiss - Metamorphic Rock Gallery
Gneiss in Joshua Tree National Park. Page 9.

Actinolite Schist - Metamorphic Rock Gallery
A greenschist consisting almost entirely of actinolite. Page 31.

Greenstone - Metamorphic Rock Gallery
Greenstone, altered basalt from Pachecho Pass in California. Page 21.

New York Gneiss - Metamorphic Rock Gallery
A lumpy gneiss from New York. Geology. Page 10.

Marble - Metamorphic Rock Gallery
Marble is metamorphosed limestone. Page 20.

Greenstone - Metamorphic Rock Gallery
Greenstone at midrange. Geology. Page 22.

Migmatitic Gneiss - Metamorphic Rock Gallery
Gneiss in the extreme displays plastic and fluid deformation. Page 12.

Migmatite - Metamorphic Rock Gallery
Migmatite from the San Gabriel Mountains. Page 13.

Phyllite - Metamorphic Rock Gallery
Phyllite, second in the pelitic metamorphic series. Page 3.

Phyllite Closeup - Metamorphic Rock Gallery
Closeup of phyllite. Geology. Page 4.

Mica Schist - Metamorphic Rock Gallery
A dark mica schist from Manhattan. Page 5.

Schist Outcrop - Metamorphic Rock Gallery
Mica Schist outcrop in New York City. Page 7.

Serpentinite Boulder - Metamorphic Rock Gallery
A 2-kg specimen of California's finest serpentine rock. Page 26.

Serpentine with Vein - Metamorphic Rock Gallery
A thick vein of serpentine. Geology. Page 24.

Slate - Metamorphic Rock Gallery
Slate is the first metamorphic rock in the pelitic sequence. Page 2.

Sedimentary Rock Gallery - Radiolarian Chert
Classic radiolarian chert from Conzelman Road in the Marin Headlands. Page 3.

Sedimentary Rock Gallery - Red Chert
Red chert from the Franciscan's Novato Quarry Terrane. Page 2.

Sedimentary Rock Gallery - Fault Breccia
A brecciated cherty mudstone. Geology. Page 22.

Sedimentary Rock Gallery - Great Valley Graywacke
Graywacke from the Great Valley Formation. Page 17.

Sedimentary Rock Gallery - Graywacke Outcrop
Graywacke in outcrop can be massive and resistant. Page 16.

Sedimentary Rock Gallery - Turbidites
Turbidite sequences crop out in a roadcut. Page 18.

Earthquake Engineering - Seismic Testing Boneyard
Wreckage of seismic engineering tests sits piled outside. Page 8.

Earthquake Engineering - Seismic Breakdown Tests
Student building designers watch their model being shaken on a test table. Page 6.

Earthquake Engineering - Shake Table Ride
Scientists smile despite themselves on an earthquake simulator. Page 10.

Studying Fault Zones with Trenches - Annotated Fault Pit
The walls of a paleoseismic fault pit are marked for the public. Page 11.

Studying Fault Zones with Trenches - Paleoseismic Trench Closeup
Looking down into a paleoseismic trench. Page 3.

Studying Fault Zones with Trenches - Trench Data Log Closeup
Logging of a paleoseismic trench is done with an overlay on photos. Page 8.

Studying Fault Zones with Trenches - Looking for Datable Material
Charcoal is prized in paleoseismic trench studies. Page 6.

Studying Fault Zones with Trenches - Scribing the Trench Walls
The walls of a paleoseismic trench are scribed to help logging. Page 5.

Studying Fault Zones with Trenches - Finishing a Paleoseismic Trench Study
After a paleoseismic trench is logged and sampled, it is filled in again. Page 9.

Tuff from Green Valley California - Volcanic Rocks
Photos of erupted igneous rocks. Page 20.

Tuff - Volcanic Rocks
Photos of erupted igneous rocks. Page 19.

Andesite - Volcanic Rocks
Andesite from Sutter Buttes, California. Page 4.

Ashfall Tuff - Volcanic Rocks
Ashfall tuff from Napa Valley, in the gallery of erupted igneous rocks. Page 18.

Vesiculated Basalt, Hawaii - Volcanic Rocks
A cobble of vesiculated, porphyritic Hawaiian basalt. Page 2.

Volcanic Breccia
Breccia is not confined to sedimentary rocks. Page 27.

Pillow Lava - Volcanic Rocks
Pillow lavas on the modern sea floor. Page 26.

Lapillistone - Volcanic Rocks
Lapillistone in the Oakland Hills, in the volcanic rocks gallery. Page 24.

Obsidian - Volcanic Rocks
Obsidian cobble, in the gallery of erupted igneous rocks. Page 8.

Pahoehoe Lava - Volcanic Rocks
Pahoehoe, a bubble-filled ropy kind of basalt lava. Page 3.

Pumice - Volcanic Rocks
Photo of pumice from Napa Valley. Page 15.

Pumice - Volcanic Rocks
Photo of pumice from the Coso Range, California. Page 16.

Pumice, Oakland Hills, California - Volcanic Rocks
Photo of pumice from the Oakland Hills, California. Page 17.

Reticulite - Volcanic Rocks
Reticulite, in the gallery of erupted igneous rocks. Page 14.

Rhyolite Closeup - Volcanic Rocks
Rhyolite from the Sutter Buttes shows its flow banding and quartz phenocrysts. Page 7.

Rhyolite - Volcanic Rocks
Rhyolite from the Salton Sea field of southern California, in the gallery of erupted igneous rocks. Page 6.

Scoria - Volcanic Rocks
Photo of Cascade Range scoria. Geology. Page 11.

Pumice - Volcanic Rocks
Photo of Alaskan pumice. Geology. Page 12.

Pumice Closeup - Volcanic Rocks
Closeup photo of Alaskan pumice. Page 13.

Welded Lapilli Tuff - Volcanic Rocks
Lapilli tuff, in the gallery of erupted igneous rocks. Page 21.

Lapilli Tuff Detail - Volcanic Rocks
Detail of lapilli tuff, in the gallery of erupted igneous rocks. Page 22.

Granite Photo Gallery - Sierra Nevada Granite
Granite of the Sierra Nevada, California. Page 3.

Granite Photo Gallery - Granite of the Sierra Nevada Batholith at Donner Pass
Granite of the Sierra Nevada Batholith at Donner Pass. Page 2.

Granite Photo Gallery - Fayalite Granite of Pikes Peak, Colorado
Pink granite from the top of Pikes Peak, Colorado. Page 9.

Granite Photo Gallery - Hand Specimen of Salinian Granite
Hand specimen of granite from the Salinian block, California. Page 5.

Granite Photo Gallery - Sierra Nevada Garnet-Hornblende Granite Closeup
Garnet and hornblende punctuate this Sierra Nevada granite. Page 4.

Granite Photo Gallery - Salinian Granite near King City
Granite of the Salinian block near King City, California. Page 6.

Granite Photo Gallery - Peninsular Ranges Granite 2
Granite of the Peninsular Ranges Batholith, southern California. Page 8.

Earthquake Engineering - Framework-Skin Decoupling
This building's skeleton is decoupled from its skin to allow movement during an earthquake. Page 3.

Earthquake Engineering - Strain-Absorbing Links
Special steel connectors absorb strain from seismic motion, saving the rest of the structure from damage. Page 2.

Earthquake Engineering - Shake Table
America's largest shake table, in Richmond, California. Page 7.

Stromatolite in Cross-Section, Lester Park, New York
Stromatolite cross section from the classic Lester Park locality, New York. Page 5.

Stromatolites in Profile, Lester Park, New York
Stromatolites in three dimensions at Lester Park, New York. Page 2.

Eroded Surface of Stromatolites
Eroded surface of stromatolite at Lester Park, Saratoga Springs, New York. Page 6.

Fossil Wood Gallery - Agatized Log
A log of fossilized wood is replaced by agate. Page 9.

1906 San Francisco Earthquake Landmarks Today - Damaged Doorway
Structures surviving from the 1906 San Francisco earthquake and fires. Page 8.

The Ferry Building: 1906 San Francisco Earthquake Landmarks Today
Structures surviving from the 1906 San Francisco earthquake and fires. Page 11.

Lotta's Fountain: 1906 San Francisco Earthquake Landmarks Today
Structures surviving from the 1906 San Francisco earthquake and fires. Page 6.

1906 San Francisco Earthquake Landmarks Today - Earthquake Refugee Cottage
Structures surviving from the 1906 San Francisco earthquake and fires. Page 7.

Calcite Geode
A hefty geode from Arkansas. Geology.

Geode Exterior
The outside of a geode gives little hint of its inside. Page 2.

Geode Fragment
Chunk of an Arkansas geode showing its calcite lining. Page 3.

Dogtooth Spar in a Geode
Dogtooth spar lining a geode. Geology. Page 5.

Calcite Geode Lining
Cross section of a calcite geode. Page 4.

Dogtooth Spar Closeup
Structure of the calcite dogteeth in a geode. Page 6.

Inside the Rock-Shop Geodes
Interior of two rock-shop geodes. Page 10.

Rock-Shop Geodes
Typical small geodes purchased from a rock shop. Page 9.

Quartz-Lined Geode
A Utah geode is lined with quartz and chalcedony. Page 8.

Geologists' Pet Rocks and Favorite Stones - Stromatolite from Itasca County Minnesota
A spectacular specimen from Proterozoic rocks in Minnesota. Page 5.

Geologists' Pet Rocks and Favorite Stones - Otis the Aa
Otis is a boulder of aa from Arizona. Page 4.

Geologists' Pet Rocks and Favorite Stones - Quartzite
A rugged quartzite boulder, one of my pet rocks. Page 3.

Geologists' Pet Rocks and Favorite Stones - Serpentinite Boulder
A glossy serpentinite boulder, one of my pet rocks. Page 2.

Hazardous Plants - Jumping Cholla
Jumping cholla is pretty, but nasty if you get too close. Page 4.

Hazardous Plants - Pampas Grass Gantlet
Pampas grass, Cortaderia, forms a threatening line by a road. Page 7.

Hazardous Plants - Pampas Grass
Geologists and rockhounds alike need to be aware of these hazardous plants in the field. Page 6.

Storing Rocks - Bag and Label Your Rocks
Plastic baggies and paper slips work fine for storing rocks. Page 2.

Storing Rocks - Find Good Rock Containers
Many ordinary containers work fine for rocks. Page 3.

Storing Rocks - Hand Specimens in a Cookie Tin
Hand specimens are easily stored in a metal cookie tin. Page 9.

Storing Rocks - Label Your Rock Containers
Label your containers as well as the rocks within them. Page 4.

Storing Rocks - A Neat, Clean, Accessible Shelf
Organized and boxed rocks are neat, clean and accessible. Page 10.

Hazardous Plants - Stinging Nettle
Geologists and rockhounds alike will want to avoid stinging nettle. Page 17.

Hazardous Plants - Oleander
Geologists and rockhounds alike need to be aware of these hazardous plants in the field. Page 5.

Poison Plants - Poison Ivy
Poison ivy, Toxicodendron radicans. Page 8.

Poison Plants - Poison Ivy Berries
Poison ivy berries; fruits of other Toxicodendrons look the same. Page 10.

Poison Plants - Poison Oak
Geologists and rockhounds alike need to be aware of these hazardous plants in the field. Page 11.

Poison Plants - NOT Poison Oak
Innocuous berry vines may superficially resemble poison ivy. Page 9.

Poison Plants - NOT Poison Oak
Geologists and rockhounds alike need to be aware of these hazardous plants in the field. Page 12.

Poison Plants - Poison Oak, Red Phase
Geologists and rockhounds alike need to be aware of these hazardous plants in the field. Page 13.

Poison Plants - Poison Sumac
Poison sumac, Toxicodendron vernix. Page 16.

Geologic Wine Labels - A Gallery of Wines with Ties to Geology
Wines with geology-related names and labels.

Ten New Year's Resolutions for Geologists
Suggestions for this and any new year.

Fossil Butte - Wyoming Geological Attractions and Destinations
Fossil Butte is one of Wyoming's geological attractions. Page 3.

Gros Ventre Landslide - Wyoming Geological Attractions and Destinations
Gros Ventre Landslide is one of Wyoming's geological attractions. Page 4.

Heart Mountain - Wyoming Geological Attractions and Destinations
Heart Mountain is one of Wyoming's geological attractions. Page 6.

Capulin Volcano - New Mexico Geological Attractions and Destinations
Capulin Volcano is one of New Mexico's geological attractions. Page 3.

Valley of Fire - Nevada Geological Attractions and Destinations
Valley of Fire is one of Nevada's geological attractions. Page 12.

Boundary Peak - Nevada Geological Attractions and Destinations
Boundary Peak is one of Nevada's geological attractions. Page 4.

Cathedral Gorge - Nevada Geological Attractions and Destinations
Cathedral Gorge is one of Nevada's geological attractions. Page 6.

Glenwood Canyon - Geology of Glenwood Springs, Colorado
Glenwood Canyon is a geological highlight of the Glenwood Springs, Colorado area. Page 3.

Colorado River - Geology of Glenwood Springs, Colorado
Looking down the Colorado River in the Glenwood Springs, Colorado area. Page 4.

Mount Sopris - Geology of Glenwood Springs, Colorado
Mount Sopris is a geological highlight of the Glenwood Springs, Colorado area. Page 8.

Red Hill, Carbondale - Geology of Glenwood Springs, Colorado
Red Hill overlooks Carbondale in the Glenwood Springs, Colorado area. Page 7.

Talus Cone Above the Colorado River - Geology of Glenwood Springs, Colorado
A large talus cone or alluvial fan at Glenwood Springs, Colorado. Page 6.

Big Dune - Nevada Geological Attractions and Destinations
Big Dune is one of Nevada's geological attractions. Page 2.

Black Rock Desert - Nevada Geological Attractions and Destinations
Black Rock Desert is one of Nevada's geological attractions. Page 3.

Carlin Canyon Unconformity - Nevada Geological Attractions and Destinations
The Carlin Canyon Unconformity is one of Nevada's geological attractions. Page 5.

Crescent Dunes - Nevada Geological Attractions and Destinations
Crescent Dunes is one of Nevada's geological attractions. Page 7.

Great Basin National Park - Nevada Geological Attractions and Destinations
Great Basin National Park is one of Nevada's geological attractions. Page 8.

Pyramid Lake - Nevada Geological Attractions and Destinations
Pyramid Lake is one of Nevada's geological attractions. Page 9.

Sevier Thrust Belt - Nevada Geological Attractions and Destinations
The Sevier Thrust Belt is one of Nevada's geological attractions. Page 10.

Upper Las Vegas Wash - Nevada Geological Attractions and Destinations
Upper Las Vegas Wash is one of Nevada's geological attractions. Page 11.

Winnemucca Dunes - Nevada Geological Attractions and Destinations
Winnemucca Dunes is one of Nevada's geological attractions. Page 13.

Glenwood Caverns - Geology of Glenwood Springs, Colorado
Glenwood Caverns is a geological highlight of the Glenwood Springs, Colorado area. Page 5.

Glenwood Hot Springs - Geology of Glenwood Springs, Colorado
Glenwood Hot Springs in Glenwood Springs, Colorado. Page 2.

Black Canyon of the Gunnison, Montrose County - Colorado Geological Attractions and Destinations
Black Canyon of the Gunnison is one of the geological highlights of Colorado. Page 2.

Colorado National Monument, Mesa County - Colorado Geological Attractions and Destinations
Colorado National Monument is one of the geological highlights of Colorado. Page 3.

Dinosaur National Monument, Moffat County - Colorado Geological Attractions and Destinations
Dinosaur National Monument is one of the geological highlights of Colorado. Page 4.

Florissant Fossil Beds, Teller County - Colorado Geological Attractions and Destinations
Florissant Fossil Beds is one of the geological highlights of Colorado. Page 5.

Glenwood Springs, Garfield County - Colorado Geological Attractions and Destinations
Glenwood Springs is one of the geological highlights of Colorado. Page 6.

Golden, Jefferson County - Colorado Geological Attractions and Destinations
Golden and its surroundings are one of the geological highlights of Colorado. Page 7.

Golden Gate Canyon, Gilpin/Jefferson Counties - Colorado Geological Attractions and Destinations
Golden Gate Canyon is one of the geological highlights of Colorado. Page 8.

Great Sand Dunes, Saguache/Alamosa Counties - Colorado Geological Attractions and Destinations
Great Sand Dunes is one of the geological highlights of Colorado. Page 9.

Mesa Verde, Montezuma County - Colorado Geological Attractions and Destinations
Mesa Verde is one of the geological highlights of Colorado. Page 10.

Pikes Peak, El Paso County - Colorado Geological Attractions and Destinations
Pikes Peak is one of the geological highlights of Colorado. Page 11.

Rocky Mountain National Park, Larimer/Grand/Boulder Counties - Colorado Geological Attractions and Destinations
Rocky Mountain National Park is one of the geological highlights of Colorado. Page 12.

Apostle Islands - Wisconsin Geological Attractions and Destinations
The Apostle Islands are one of Wisconsin's geological attractions. Page 2.

Mill Bluffs - Wisconsin Geological Attractions and Destinations
Mill Bluffs is one of Wisconsin's geological attractions. Page 8.

The Driftless Area - Wisconsin Geological Attractions and Destinations
The Driftless Area is one of Wisconsin's geological attractions. Page 5.

Whitefish Dunes - Wisconsin Geological Attractions and Destinations
Whitefish Dunes is one of Wisconsin's geological attractions. Page 10.

Banning Sandstone Quarry - Minnesota Geological Attractions and Destinations
Banning Sandstone Quarry is one of Minnesota's geological attractions. Page 2.

Blue Mounds - Minnesota Geological Attractions and Destinations
Blue Mounds is one of Minnesota's geological attractions. Page 3.

Gneiss Outcrops - Minnesota Geological Attractions and Destinations
Gneiss Outcrops is one of Minnesota's geological attractions. Page 4.

Taylors Falls - Minnesota Geological Attractions and Destinations
Taylors Falls is one of Minnesota's geological attractions. Page 11.

Minnehaha Falls - Minnesota Geological Attractions and Destinations
Minnehaha Falls is one of Minnesota's geological attractions. Page 5.

Mystery Cave - Minnesota Geological Attractions and Destinations
Mystery Cave is one of Minnesota's geological attractions. Page 7.

Pipestone National Monument - Minnesota Geological Attractions and Destinations
Pipestone National Monument is one of Minnesota's geological attractions. Page 8.

Quarry Park - Minnesota Geological Attractions and Destinations
Quarry Park is one of Minnesota's geological attractions. Page 9.

Soudan Underground Mine - Minnesota Geological Attractions and Destinations
Soudan Underground Mine is one of Minnesota's geological attractions. Page 10.

Chesapeake and Ohio or C&O Canal - Maryland Geological Attractions and Destinations
The C&O Canal is one of Maryland's geological destinations. Page 4.

Calvert Cliffs - Maryland Geological Attractions and Destinations
Calvert Cliffs is one of Maryland's geological destinations. Page 2.

Catoctin Mountain - Maryland Geological Attractions and Destinations
Catoctin Mountain is one of Maryland's geological destinations. Page 3.

Great Falls of the Potomac - Maryland Geological Attractions and Destinations
Great Falls of the Potomac is one of Maryland's geological destinations. Page 6.

South Mountain - Maryland Geological Attractions and Destinations
South Mountain is one of Maryland's geological destinations. Page 10.

Sugarloaf Mountain - Maryland Geological Attractions and Destinations
Sugarloaf Mountain is one of Maryland's geological destinations. Page 11.