Latest Articles and Resources Aftershocks Are Not Afterthoughts Updated: Wed May 14 21:25:50 2008
Aftershocks can be nasty surprises, even worse than the main event… Earth Art Gallery Updated: Wed May 14 20:56:58 2008
Earth art photo gallery… Earth Art Gallery - Stone Flower by Richard Botto Created: Wed May 14 20:56:55 2008
The stone flowers and mushrooms created by Richard Botto are Earth art… About Geology -- The Complete Guide to Geology Updated: Mon May 12 23:14:14 2008
About Geology includes everything from outer space to the Earth's core, from the oldest fossils to the landslides and earthquakes of today… Ballfield Dirt Updated: Sat May 10 04:01:44 2008
Baseball is played on a precision geotechnical product. … Mud Volcanoes Updated: Fri May 9 23:59:17 2008
A gallery of the four basic types of mud volcano… Gallery of Artificial Rocks Updated: Fri May 9 22:50:50 2008
Bricks, mortar, concrete, plaster and other artificial rocks… Artificial Rocks - Plaster Frieze Updated: Fri May 9 22:50:46 2008
Plaster makes up an elegant bas-relief in Oakland, California… Gallery of Artificial Rocks - Concrete Sidewalk Cross Section Updated: Fri May 9 22:41:27 2008
A beveled concrete sidewalk reveals its aggregate interior… Planetology, the New Science Updated: Fri May 9 00:57:29 2008
Planets have gone from gods, to worlds, to mere examples of a species… Two Ways to Look at Caves Updated: Fri May 9 00:47:41 2008
A look at caves by a former caver and current armchair scientist… Geologic Jobs Updated: Fri May 9 00:39:03 2008
Is this your life? Geology, the job, and where to get it… About the Earth's Core Updated: Thu May 8 19:56:34 2008
How we study the Earth's core and what it's made of… Sedimentary Rock Gallery Updated: Thu May 8 03:58:27 2008
An assortment of different sedimentary rocks… Sedimentary Rock Gallery - Anthracite Coal Updated: Thu May 8 03:58:20 2008
Anthracite coal from a Welsh mine… Obsidian Updated: Thu May 8 03:55:11 2008
Obsidian chunk from the Napa Valley volcanoes… Toward Real-Time Earthquake Warnings Updated: Wed May 7 00:56:08 2008
Ultrafast quake warnings are the future promise, but meanwhile early-warning systems are bringing us benefits right now… Handicapping the News Updated: Tue May 6 23:44:11 2008
A how-to on looking ahead of the news cycle… Brought To You By . . . Science Writers Updated: Tue May 6 22:48:09 2008
A look at the pros who really bring you the news from science… Look to the Skies! - Cosmic Impacts Updated: Tue May 6 00:45:44 2008
Research on cosmic impacts has made us take a big gulp and thank our lucky stars… Viewing Earth from on High Updated: Tue May 6 00:04:20 2008
The big view of Earth's surface that space gives geologists makes possible discoveries never before imagined… From Earth Up to Space - Atmospheric Geology Updated: Mon May 5 23:03:38 2008
Space research gives us a high eye on the upper atmosphere and some pretty cool occurrences there… Radioisotopes from Space Updated: Mon May 5 22:08:06 2008
Closing in on radiocarbon discrepancies through the space program pays off in knowledge about the Earth… Clues from Solar Studies Updated: Mon May 5 22:05:59 2008
Studying the Sun tells a lot about the Earth… Igneous Rock Textures - Pyroclastic Texture Updated: Mon May 5 19:31:04 2008
Rocks with pyroclastic texture are made of pieces of volcanic material… Igneous Rock Textures Updated: Mon May 5 19:31:04 2008
The seven major texture types found in igneous rocks… Igneous Rock Textures - Vesicular Texture Updated: Mon May 5 19:31:03 2008
Rocks with vesicular texture are full of bubbles… Igneous Rock Textures - Porphyritic Texture Updated: Mon May 5 19:31:03 2008
Rocks with porphyritic texture have larger grains in a matrix of smaller grains… Igneous Rock Textures - Equigranular Texture Updated: Mon May 5 19:31:03 2008
Rocks with equigranular texture have grains the same size… Igneous Rock Textures - Glassy or Hyaline Texture Updated: Mon May 5 19:31:03 2008
Glassy rocks have no or almost no grains… Igneous Rock Textures - Phaneritic Texture Updated: Mon May 5 19:31:02 2008
Phaneritic rocks have visible mineral grains… Igneous Rock Textures - Aphanitic Texture Updated: Mon May 5 19:31:02 2008
Aphanitic rocks have mostly invisible mineral grains… Dinosaur Ridge, Morrison, Colorado Updated: Fri May 2 23:40:34 2008
Photos from Dinosaur Ridge National Natural Landmark near Denver, Colorado… Psilomelane Updated: Fri May 2 23:29:04 2008
Psilomelane crusts a piece of deep-sea chert… Mineral Habits Updated: Fri May 2 23:25:01 2008
The various forms that minerals take in rocks… Mineral Habits - Dendritic Habit Updated: Fri May 2 23:24:56 2008
Copper metal displays a branching dendritic habit… Pictures of Geologic Features and Processes Updated: Fri May 2 23:22:49 2008
Pictures of geologic features and the processes of geology… Dendrite or Dendrolite Created: Fri May 2 23:20:44 2008
Dendrite in a Colorado sandstone… Sedimentary Rock Gallery - Conglomerate, Tumey Hills, California Updated: Fri May 2 22:49:41 2008
A spectacularly diverse conglomerate from the Tumey Hills in the Coast Range… Sedimentary Rock Gallery - Bituminous Coal Updated: Fri May 2 22:48:35 2008
Bituminous coal in the gallery of sedimentary rocks… About Sedimentary Rocks Updated: Fri May 2 22:46:09 2008
The second of the three great rock classes is introduced with photos… Metamorphic Rock Gallery Updated: Fri May 2 22:37:16 2008
A spectrum of metamorphic rocks, the pelitic sequence and the basaltic sequence… Phaneritic Igneous Rock Classification Updated: Fri May 2 22:22:33 2008
Simplified Q-A-P ternary diagrams showing IUGS classification of phaneritic igneous rocks… Granitoids Updated: Fri May 2 22:15:46 2008
How geologists sort out granite from the rocks that look like it… Extrusive Igneous Rock Types Updated: Thu May 1 22:05:03 2008
Photos of the types of erupted igneous rocks… Extrusive Igneous Rocks - Obsidian Updated: Thu May 1 22:04:57 2008
Obsidian cobble, in the gallery of erupted igneous rocks… What Is a Rock? Updated: Thu May 1 22:00:45 2008
Everyone knows what a rock is, until you ask what it is exactly… Earth Art Gallery - The Globe as Art Updated: Thu May 1 04:53:50 2008
Earth itself becomes art in San Francisco's Yerba Buena Gardens… Earth Art Gallery - Roadside Shotcrete Sculpture Updated: Thu May 1 00:12:27 2008
Road projects hire sculptors to make shotcrete look like stone… Earth Art Gallery - Petroglyphs Created: Thu May 1 00:06:08 2008
Petroglyphs of the American Southwest qualify as Earth art… Earth Science - Not Just for Grownups Updated: Wed Apr 30 00:40:34 2008
Sharing science, real science, with kids is good for everybody--teachers, students, and scientists… The Tin Men, page 2 Updated: Wed Apr 30 00:36:24 2008
The Cornish culture has spread from its mining homeland to mining regions around the world… Earth Art Gallery - Gongshi or Chinese Scholar Stones Updated: Tue Apr 29 23:40:20 2008
A gongshi or scholar's stone from China in the Earth art photo gallery… Oldoinyo Lengai, World's Weirdest Volcano Updated: Tue Apr 29 23:27:03 2008
Oldoinyo Lengai erupts sodium carbonate--not quite a big rock candy mountain, but then nothing else about it is quite like the song… The Rise of Erosion Updated: Tue Apr 29 23:21:41 2008
This old standby of the old geology is back on today's scientific cutting edge… Keeping Teachers Learning Updated: Tue Apr 29 23:10:11 2008
Some great resources are out there for you teachers of Earth science… Geologic Map of Washington State Updated: Tue Apr 29 23:06:02 2008
Washington state geologic map, at three different scales, presented with notes… The Gold Rushes Updated: Tue Apr 29 22:55:42 2008
California's was not the first nor the last… Here's Sand in Your Eye Updated: Tue Apr 29 22:51:29 2008
Sand-related sites are as numerous as sand grains… Preparedness Pays in Seattle Updated: Tue Apr 29 22:30:14 2008
The February 2001 Seattle earthquake has demonstrated that preparedness pays… Unconformities: Gaps in the Record Updated: Tue Apr 29 22:27:49 2008
In rocks, what is not there can be as informative as what is there… Black Smokers, Cold Seeps, Whale Falls Updated: Tue Apr 29 22:26:55 2008
Three different seafloor communities have a worldwide connection… The Lava-Lamp Earth Updated: Tue Apr 29 22:20:19 2008
Were the old stoners watching the Earth's mantle unawares?… Strange Seismometers Updated: Tue Apr 29 22:18:15 2008
A seismometer can be as simple as a rock just standing there or as unexpected as soup cans on the grocer's shelves… Geology and Society Picture Gallery Updated: Tue Apr 29 22:01:43 2008
Where geology overlaps the wider culture… Types of Volcanoes Updated: Tue Apr 29 18:16:53 2008
The major volcano types found on land… Types of Volcanoes - Rhyolite Dome in Maar Updated: Tue Apr 29 18:16:48 2008
A Coso rhyolite dome sits in the maar that preceded it… Types of Volcanoes - Lava Dome Updated: Tue Apr 29 18:15:46 2008
Sugarloaf Mountain is a lava dome in the Coso volcanic field of eastern California… Coso Geothermal Field, California Updated: Tue Apr 29 18:06:25 2008
The Coso geothermal field is a major producer of geothermal electricity… Coso Geothermal Field, California - Steam Pipes and Mudpots Updated: Tue Apr 29 18:04:19 2008
Pipes carry steam from production wells past a group of mudpots in the Coso geothermal field… Coso Geothermal Field, California - Navy Unit 1 Power Plant Updated: Tue Apr 29 18:04:19 2008
Navy Unit 1 Power Plant in the Coso geothermal field, eastern California… Coso Geothermal Field, California - Steam Production Pipelines Updated: Tue Apr 29 18:04:19 2008
Steam production pipelines at the Coso geothermal field, eastern California… Coso Geothermal Field, California - Mudpot Updated: Tue Apr 29 18:03:15 2008
Mudpot in the Coso geothermal field, eastern California… Coso Geothermal Field, California - Fumarole Updated: Tue Apr 29 18:03:15 2008
A fumarole vents steam at the Coso geothermal field, eastern California… Coso Geothermal Field, California - Geothermal Drilling Updated: Tue Apr 29 18:03:15 2008
Exploratory drilling at the Coso geothermal field of eastern California… Coso Geothermal Field, California - Geologic Map of the Coso Range Updated: Tue Apr 29 18:03:14 2008
Geologic map of the Coso Range, site of the Coso geothermal field… Coso Geothermal Field, California - Sugarloaf Mountain Rhyolite Dome Updated: Tue Apr 29 18:03:14 2008
Sugarloaf Mountain is the largest lava dome in the Coso geothermal field… Coso Geothermal Field, California - Obsidian Tools Updated: Tue Apr 29 18:03:14 2008
The Coso geothermal field was valued by Indians as an obsidian source… Coso Geothermal Field, California - Location Map of the Coso Range Updated: Tue Apr 29 18:02:16 2008
Location map of the Coso Range, eastern California, and major faults… Coso Geothermal Field, California - Boiling Spring Updated: Tue Apr 29 18:02:16 2008
Boiling spring in the Coso geothermal field… Chimney Updated: Sat Apr 26 03:59:55 2008
A tall chimney off the Marin County coast of California… About Geothermal Energy Updated: Sat Apr 26 00:31:08 2008
Geothermal energy exploits the Earth's heat budget… Coso Geothermal Field, California - Mudpot Portrait Updated: Sat Apr 26 00:26:49 2008
A visit to the Coso geothermal field is an exhilarating experience… Potassium-Argon Dating Methods - K-Ar and Ar-Ar Dating Updated: Thu Apr 24 17:01:14 2008
Potassium-argon isotopic dating is especially useful for determining the age of lavas… Earth Day? How About Earth Life? Updated: Tue Apr 22 17:03:24 2008
Looking beyond Earth Day to the program humanity really needs… Rocks of Red Rocks, Colorado Updated: Mon Apr 21 17:17:03 2008
Pictures of the distinctive Fountain Formation of the Colorado Front Range exposed at Red Rocks Park. … Suilven, Scotland Updated: Mon Apr 21 03:48:36 2008
Suilven peak, western Scotland… Minerals with Metallic Luster Updated: Sat Apr 19 04:43:59 2008
Minerals with metallic luster are easy to learn to identify… From Earth Up to Space: Earth Science in Space 5 Updated: Sat Apr 19 04:35:40 2008
Space research gives us a high eye on the upper atmosphere and some pretty cool occurrences there… Rocks and Gravel Wine Created: Sat Apr 19 04:10:50 2008
Rocks and Gravel is a Rhone-style blend that mimics the ideal vineyard… Tufa Towers - Trona Pinnacles, California Updated: Fri Apr 18 18:32:32 2008
America's largest collection of tufa towers is in the Mojave Desert near Trona, California… 1906 San Francisco Earthquake Landmarks Today Updated: Fri Apr 18 04:44:17 2008
Structures surviving from the 1906 San Francisco earthquake and fires… The Ferry Building: 1906 San Francisco Earthquake Landmarks Today Updated: Fri Apr 18 04:44:16 2008
Structures surviving from the 1906 San Francisco earthquake and fires… Tufa Towers - Trona Pinnacles, California - Trona Pinnacles, Souther… Updated: Fri Apr 18 01:11:17 2008
The southern group of tufa towers in the Trona Pinnacles requires four-wheel drive to visit… Tufa Towers - Trona Pinnacles, California - Tufa at Trona Pinnacles Updated: Fri Apr 18 01:05:02 2008
Tufa closeup from the Trona Pinnacles, California… Tufa Towers - Trona Pinnacles, California - Help Preserve the Trona … Updated: Fri Apr 18 01:05:02 2008
America's largest collection of tufa towers needs your cooperation… Tufa Towers - Trona Pinnacles, California - Tufa Structure at Trona … Updated: Fri Apr 18 01:03:58 2008
The tufa of Trona Pinnacles displays intricate structure… Tufa Towers - Trona Pinnacles, California - Trona Pinnacles, Norther… Updated: Fri Apr 18 01:03:57 2008
The northern group of tufa towers in the Trona Pinnacles is not hard to get to… Tufa Towers - Trona Pinnacles, California - Tufa Tower Cluster Updated: Fri Apr 18 01:03:57 2008
The tufa towers of the Trona Pinnacles tend to occur in clusters… Tufa Towers - Trona Pinnacles, California - Tufa Tower at Trona Pinn… Updated: Fri Apr 18 01:03:57 2008
Some of the tufa towers of Trona Pinnacles reach 40 meters in height… Tufa Towers - Trona Pinnacles, California - Approaching the Trona Pi… Updated: Fri Apr 18 01:03:56 2008
The Trona Pinnacles are widely visible in the Mojave Desert near Trona, California… Tufa Towers - Trona Pinnacles, California - The Pinnacles Updated: Fri Apr 18 01:03:56 2008
The tufa towers of Trona Pinnacles are in the Mojave Desert near Trona, California… Tufa Towers - Trona Pinnacles, California - Searles Lake and the Tro… Updated: Fri Apr 18 01:03:56 2008
The Trona Pinnacles owe their existence to Searles Lake near Trona, California… Red Rock Canyon State Park, California Updated: Thu Apr 17 00:31:41 2008
This iconic locality has starred in many movies, Western and otherwise… Red Rock Canyon State Park, California - Basalt in Dove Spring Wash Updated: Thu Apr 17 00:31:40 2008
Basalt flows tilt into Dove Spring Wash at Red Rock Canyon State Park, California… Red Rock Canyon State Park, California - Crossbedding in Tuff Updated: Thu Apr 17 00:31:40 2008
Tuff at Red Rock Canyon State Park, California, displays crossbedding… Red Rock Canyon State Park, California - Basalt on Sediments Updated: Thu Apr 17 00:31:40 2008
Basalt tops the sedimentary cliffs at Red Rock Canyon State Park, California… Red Rock Canyon State Park, California - Dove Spring Wash Updated: Thu Apr 17 00:31:40 2008
Dove Spring Wash is a less traveled part of Red Rock Canyon State Park, California… Red Rock Canyon State Park, California - Tuff of the Dove Spring For… Updated: Thu Apr 17 00:31:40 2008
The Dove Spring Formation at Red Rock Canyon State Park, California, contains tuff beds… Red Rock Canyon State Park, California - Cliff Niche Updated: Thu Apr 17 00:30:37 2008
A picturesque niche in the cliffs of Red Rock Canyon State Park, California… Red Rock Canyon State Park, California - Red Rock Canyon Strata Updated: Thu Apr 17 00:30:37 2008
Sedimentary rocks at Red Rock Canyon State Park, California, are strongly tilted… Red Rock Canyon State Park, California - Red Rock Canyon Postcard Vi… Updated: Thu Apr 17 00:30:36 2008
A postcard view from Red Rock Canyon State Park, California… Red Rock Canyon State Park, California - El Paso Mountains Updated: Thu Apr 17 00:30:36 2008
Red Rock Canyon State Park is in California's El Paso Mountains… Red Rock Canyon State Park, California - Red Rock Canyon Cliffs Updated: Thu Apr 17 00:29:33 2008
Colorful cliffs greet the visitor to Red Rock Canyon State Park, California… Stereoscopic Images - Geology in 3D Updated: Wed Apr 16 18:24:55 2008
Visualize in three dimensions with photo stereopairs… Anthill - Bioturbation Updated: Tue Apr 15 22:24:35 2008
Red desert ants mix the soil in a California desert park… Sedimentary Rock Gallery - Limestone Breccia Updated: Tue Apr 15 21:50:34 2008
A breccia boulder made of gray limestone… Tombolo Gallery Updated: Tue Apr 15 16:12:23 2008
Pictures of these rare sandbars that extend to a nearshore island. … Tombolo Gallery - Tombolo at Hog Island, California Updated: Tue Apr 15 16:08:12 2008
Hog Island, California, is connected to the shore of Tomales Bay by a tombolo. …
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