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Hardness Pickshardness picks Hardness Picks - Mohs hardness testing with precise and easy-to-use hardness picks. Fluorescent MineralsFluorescent Minerals Fluorescent Minerals and rocks glow with spectacular colors under ultraviolet light. Lightning Strikes MapLightning Strikes Map Lightning Strikes Map by NASA shows the worldwide distribution of lightning activity.
AzuriteAzurite Azurite - Used as an ore of copper, a pigment, ornamental stone and gem material. Crushed StoneCrushed Stone Crushed Stone - About four tons per person is used each year in the United States. EmeraldEmerald Emerald is the most popular green gemstone in the United States and most of the world.
Bear AttacksBear Attacks Bear Attacks - Knowing how to react to a bear encounter or attack could save your life. Roadside GeologyRoadside Geology Guides Roadside Geology Guides Discover the geology of your favorite state. Great for road trips. USA Landslide MapLandslides Landslide Incidence Map - A USGS map showing landslide incidence in the United States.
100+ Gemstonescolored stones 100+ Gems - Photos of over 100 beautiful gems ranging from the popular to the obscure. Volcanic ExplosivityVolcanic Explosivity Volcanic Explosivity - Rating volcanic eruptions based upon the volume of tephra ejected. San Andreas Fault MapSan Andreas Fault Map Google Map of the San Andreas Fault Zoom in to see the fault trace on satellite images.
MineralsMinerals Minerals Descriptions, photos, articles, properties and uses for common minerals. Mineral HardnessMohs Hardness Test Mohs Hardness Scale is a set of reference minerals used for classroom hardness testing. Watch out for Ticks!ticks Ticks are a problem for geologists in some areas. Learn to recognize and avoid them.
Gold PansGold Pans Gold Pans and Panning Kits - classifiers, snuffer bottles. Learn how to pan for Gold. Uses of MarbleUses of Marble The Uses of Marble are numerous and diverse. You will be surprised by how it is used. ChalcopyriteChalcopyrite Chalcopyrite - The most important ore of copper for over five thousand years.
GarnetGarnet Garnet is best known as a red gemstone. It occurs in any color and has many industrial uses. ShaleShale Shale - The rock that has quickly transformed the oil and gas industry. Blue FlamesBlue Flames Blue Flames and the largest highly acidic lake in the world at Kawah Ijen Volcano.
Facts About CopperCopper Facts About Copper - Information about copper uses, production, resources and more. What is LNG?What is LNG? What is LNG? The use of LNG as an energy source is growing rapidly. Learn more about LNG. PeridotitePeridotite Peridotite is a chromite host rock, a source of diamonds and a possible carbon dioxide sink.
UV Mineral LampUV Mineral Lamp Portable UV Lamp - Short and long wave UV for fluorescent mineral viewing. Frac SandFrac Sand Frac Sand - A specialty sand used to maintain porosity in hydraulic fracturing. Rare Earth ElementsRare Earth Elements Rare Earths - Special materials used in electronics, defense, medical & many other products.
Mount VesuviusMount Vesuvius Mount Vesuvius - geology, history, maps, facts and more about the Vesuvius eruptions. Diamond ProducersDiamond Production Diamond Production leaders include: Botswana, Russia, Angola and Canada. ObsidianObsidian Obsidian - the volcanic rock that cools so quickly that it becomes a natural glass.
What Is Earth Science?What Is Earth Science? What Is Earth Science? The study of Earth and its neighbors in space. Learn more! Google Earth - FreeDownload Google Earth Free Free Google Earth software allows you to browse seamless world satellite images. Free. Methane HydrateMethane Hydrate Methane Hydrate deposits contain more fuel value than all other fossil fuels combined.
Mount EtnaMount Etna Mount Etna - The most active volcano in Europe continues an eruption that started in 2001. Wall MapsWall Maps Wall Maps - Wall maps of the world, continents, states and the USA. Hydraulic FracturingHydraulic Fracturing Hydraulic fracturing increases well yield by fracturing the reservoir rock with fluid injection.
Life on Europa?Life on Europa Life on Europa could exist in a salty ocean deep below its frozen surface. SunstoneSunstone Sunstone - A gem feldspar with aventurescence caused by light reflecting from platy inclusions. Sea Level Rise MapsSea Level Rise Maps Sea Level Rise Maps - See what will be flooded as sea level rises.
Rocks on MarsRocks on Mars Rocks on Mars - Many of the rocks found on Mars are not very different from Earth rocks. ZirconZircon Zircon is the primary ore of zirconium and a gemstone that is available in many colors. Rock ArtRock Art Rock Art - People have been marking on rocks for thousands of years.
Mineral RightsMineral Rights Mineral Rights Who owns the minerals under your land? Who wants to buy them? DiamondsDiamonds Diamonds - Learn about the properties of diamond, its many uses and diamond discoveries. Tallest MountainTallest Mountain Tallest Mountain - Everest has rivals in tallness, altitude and distance to the center of Earth.
The Brewery Rock ?diatomite The Rock Used to Make Beer - Geologists are beer experts and should know about this rock. Fire OpalFire Opal Fire Opal is a transparent to translucent opal with a yellow, orange or red background color. Lapis LazuliLapis Lazuli Lapis Lazuli - a metamorphic rock and the most popular blue opaque gemstone in history.
Gems from SpaceGems from Space Extraterrestrial Gems - A number of materials from space are used as attractive gems. Crater of DiamondsCrater of Diamonds Crater of Diamonds - The only diamond mine in the world where you can be the miner. VolcanoesVolcanoes Volcanoes - Articles about volcanoes, volcanic hazards and eruptions past and present.
GemstonesGemstones Gemstones - Colorful images and articles about diamonds and colored stones. Uses of GoldUses of Gold The Many Uses of Gold - Unique properties make gold one of the most useful metals. Asteroid Impact MapAsteroid Impact Map Asteroid Impact Map - Explore fifty of the most obvious asteroid impact craters on Earth.
GraniteGranite Granite - The intrusive igneous rock that underlies continents and countertops. San Andreas FaultSan Andreas Fault The San Andreas Fault - A feature that separates the Pacific and North American Plates. Tanzanitetanzanite Tanzanite was unknown until a few decades ago but it has erupted into wide popularity.
What Is The Moho?What Is The Moho? What Is The Moho? The Mohorovicic Discontinuity is the mantle/crust boundary. Petrified WoodPetrified Wood Petrified Wood is a fossil that forms when dissolved material preciptates and replaces wood. Homeowners InsuranceHomeowners Insurance Homeowners Insurance usually does not cover the most common geologic hazards.
AmmoliteAmmolite Ammolite is a fossil and a gemstone. It is shell material from fossil ammonites. Rock KitsRock Kits Rock Kits for classroom and personal study. A great way to learn about rocks. What is Geology?What is Geology? What is Geology? - The study of Earth materials, structures, processes and life over time.
Geology ToolsGeology Tools Geology Tools Rock hammers, field bags, hand lenses, maps, hardness picks, gold pans. RocksRocks Rocks - Galleries of igneous, sedimentary and metamorphic rock photos with descriptions. Sliding RocksSliding Rocks Sliding Rocks Mystery - What causes these rocks to slide across a playa in Death Valley?
Coal Close UpCoal through a microscope Coal Through a Microscope - Coal is more than a black rock. It is THE most interesting rock. Ant Hill GarnetsAnt Hill Garnets Ant Hill Garnets - tiny gems that ants haul to the surface and discard on their anthill. Honest! MeteoritesMeteorites Meteorites - Rocks that were once parts of planets or large asteroids.
Great Rift ValleyGreat Rift Valley The East Africa Rift System - The extensive fault system that is tearing Africa apart. LabradoriteLabradorite Labradorite is a feldspar mineral that sometimes exhibits an iridescent play-of-colors Record LightningLake Maracaibo Lightning World Record Lightning - this lake has more lightning than any other place in the world.
Land Below Sea LevelLand Below Sea Level Land Below Sea Level - Did you know that dozens of land locations are below sea level? Quartzitequartzite Quartzite is metamorphic rock formed when sandstone is subjected to heat and pressure. Gem SilicaGem Silica Gem Silica is a blue chalcedony colored by copper. It is the rarest and most valuable chalcedony.
Canadian DiamondsCanadian Diamonds Canada is one of the world*s leading producers of gem-quality diamonds. Field CoursesField Camps Field Courses - Over 80 field courses for undergraduate geology students. Eagle Ford ShaleEagle Ford Shale Eagle Ford Shale - One of the most prolific oil and gas producers in the United States.
Dowsingdowsing Dowsing is a method used to find underground water that is rejected by most geologists. Rock TumblersRock Tumblers Rock Tumblers - All about rock tumblers and rock tumbling. Read before you buy a tumbler. Teacher ResourcesTeacher Resources Teacher Resources - K-12 resources for teaching about earth science.
Ruby and Sapphireruby and sapphire Ruby and Sapphire are the 2nd and 3rd most popular colored stones in the United States. Red BerylRed Beryl Red Beryl is one of the rarest gems. Small amounts are mined at one locality in Utah. Expansive SoilExpansive Soil Expansive Soil Causes more damage than floods, hurricanes & tornadoes combined.
TurquoiseTurquoise Turquoise - A bluish-green gem material that has been used for over 6000 years. RhodoniteRhodonite Rhodonite - a manganese silicate used as a minor ore of manganese and as a gemstone. Bear MapBear Map Range of Bear Species - Where you might encounter different types of bears.
What is a Geyser?What is a Geyser? What is a Geyser? Photos and information about geysers in many parts of the world. Cave of the HandsCave of the Hands Cave of the Hands is a cave where ancient people painted hands about 9000 years ago. Largest VolcanoesLargest Volcanoes Largest Volcano - That title is shared by Tamu Massif, Mauna Kea and Ojos del Salado.
RhyoliteRhyolite Rhyolite An extrusive igneous rock with a high silica content, produced from granitic magma. The Acid TestThe Acid Test The Acid Test - Geologists use dilute hydrochloric acid to identify carbonate minerals. SandSand Sand is a diverse material. This gallery includes photos of sand from around the world.
June 6, 1912Novarupta June 6, 1912 - The most powerful volcanic eruption of the 20th century. CorundumCorundum Corundum is the third hardest mineral. It is also the mineral of ruby and sapphire. MineraloidsMineraloids Mineraloids are amorphous naturally-occurring inorganic solids that lack crystallinity.
Arctic Seafloor MapArctic Ocean Seafloor Map Arctic Ocean Seafloor Map The ridges, basins, shelves and rifts defining the Arctic seafloor. HematiteHematite on Mars Hematite - The most important ore of iron. A source of mineral pigment since prehistory. Kyanitekyanite Kyanite is a metamorphic mineral used to make porcelain, abrasive products and gems.
US Diamond MinesUS Diamond Mines US Diamond Mines - Did you know that diamonds have been mined in the United States? Hand LensHand Lens Hand Lens A 10-power folding magnifier in a metal case. A frequently used lab and field tool. SoapstoneSoapstone Soapstone is a metamorphic rock with properties that make it suitable for a variety of projects.
Azurite GraniteK2 Granite Azurite Granite ? A white granite with blue orbs of azurite. A new material from Pakistan. Salt DomesSalt Domes Salt Domes - Salt structures that are often associated with oil and natural gas accumulations. Types Of EruptionsTypes Of Eruptions Types of Volcanic Eruptions - A description of the most common eruption types.
Earthquake MapsCalifornia Earthquake Maps California Earthquake Maps A collection of isoseismal maps for earthquakes in California. TourmalineTourmaline Tourmaline - the most colorful mineral and natural gem material on Earth. Mount ClevelandMount Cleveland Mount Cleveland is an active volcano in the Aleutian Islands and a threat to air traffic.
OlivineOlivine Olivine - Abundant in Earth*s mantle. A constituent of meteorites. The gem peridot. Geology of Heliumhelium Helium is a byproduct of the natural gas industry. Its most important use is in MRI. MisconceptionDiamonds from Coal Diamond Misconception - Many people think that diamonds form from coal. Not True!
RhodochrositeRhodochrosite Rhodochrosite - a manganese mineral used as an ore, a pink gem and an ornamental stone. Horizontal DrillingHorizontal Drilling Horizontal Drilling has opened new resources and significantly improved productivity. What is a Maar?What is a Maar? What is a Maar? The second most common volcanic landscape feature on Earth.
Huge Diamond DepositPopigai Diamonds The Largest Diamond Deposit in the world could be under Popigai Crater in Russia. What are Glaciers?What are Glaciers? What are Glaciers? Learn how glaciers form, flow, advance, retreat, and change over time. Oil Fields from Spacenatural gas flaring Oil Fields from Space - Night views of Earth show the distribution of oil field activity.
Antarctic Meteoriteshunting meteorites in Antarctica The Richest Meteorite Field - More meteorites found here than anywhere else on Earth. Pavlof VolcanoPavlof Volcano Pavlof Volcano - one of the most active volcanoes in North America and threat to air traffic. Tallest TsunamiTallest Tsunami Tallest Tsunami - A wave with a run-up height of 1720 feet occurred in Lituya Bay, Alaska.
GeodesGeodes Geodes look like ordinary rocks on the outside but can be spectacular inside! Plate TectonicsPlate Tectonics Plate Tectonics - Articles and maps about plate tectonics and the interior of Earth. Fee Mining SitesFee Mining Fee Mining sites are mines that you can enter, pay a fee, and keep anything that you find.
OpalsOpal Pictures of Opal - A collection of different types of opal from all around the world and Mars too! FossilsFossils Fossils - Learn about fossils and discoveries around the world. Largest EarthquakeLargest Earthquake Largest Earthquake ever recorded - Magnitude 9.5. Chile, 1960.
Oil and GasOil and Gas Oil and Gas - Articles about oil and natural gas in the US and around the world.    
Geology in the News
Video: Exploring Earth's Changing Ice Sheets
March 28 | Lamont-Doherty Earth Observatory
Under the Dead Sea, Warnings of Dire Drought
March 28 | Lamont-Doherty Earth Observatory
Tracking Volcanic Bombs in Three Dimensions
March 28 | EOS Earth & Space Science News
AGI Releases *Faces of Earth* on YouTube
March 26 | American Geosciences Institute
The Changing Freshwater Carbon Cycle
March 26 | EOS Earth and Space Science News
Explaining Why Some Paleomagnetic Results Fail
March 26 | EOS Earth and Space Science News
BP Orders Construction for New Subsea Production System
March 26 | United Press International
Fog and Dew Keep Africa*s Namib Desert Ecosystem Going
March 24 | National Science Foundation
Lake Erie Ice Volcanoes Are Back
March 24 | The Buffalo News
Mapping the Topographic Fingerprints of Humanity Across Earth
March 24 | EOS Earth & Space Science News
Frozen Splendor: Gems and Minerals Near the Arctic Region
March 24 | Gemological Institute of America
Dust Obscures the Red Sea
March 23 | NASA Earth Observatory
Dam Building in an Area of Ancient Landslides
March 22 | The Landslide Blog
Pastor Finds $5M Diamond in Sierra Leone
March 22 | Anadolu Agency
Where is Sierra Leone?
March 22 | Geology.com
United Arab Emirates Oil and Gas Report
March 21 | Energy Information Administration
Glacial Outburst Flood near Mount Everest Caught on Video
March 21 | EOS Earth & Space Science News
Who Is Buying U.S. LNG?
March 20 | ArgusMedia
Rising Exports Draw Down Near-Record Propane Inventories
March 20 | Energy Information Administration
Snow Blankets Northeastern U.S.
March 17 | NASA Earth Observatory
Melting Sea Ice May Be Speeding Nature*s Clock in the Arctic
March 17 | University of California, Davis
Ten Injured in Explosion on Etna Volcano
March 17 | Associated Press
U.S. Energy-Related Carbon Dioxide Emissions, 2015
March 17 | Energy Information Administration
Inclusions in Natural, Synthetic, and Treated Emerald
March 17 | Gemological Institute of America
What are Emeralds?
March 17 | Geology.com
What is a Fluorescent Mineral?
March 17 | Geology.com
U.S. Ethanol Exports Rise 26% in 2016
March 16 | Energy Information Administration
Slower Snowmelt in a Warming World
March 16 | University Corporation for Atmospheric Research
Taking Earth*s Inner Temperature
March 16 | Woods Hole Oceanographic Institution
Predicting Red Tides
March 16 | Scripps Institution of Oceanography
What Are Agate, Jasper and Chalcedony?
March 15 | RockTumbler.com (affiliated with Geology.com)
Video: The Role of Gas in Eruptions at Stromboli Volcano
March 15 | American Geophysical Union on YouTube
What is a Fluorescent Mineral?
March 14 | Geology.com
U.S. Coal Exports and Imports Both Decline in 2016
March 14 | Energy Information Administration
The Challenge of Tracking Nutrient Pollution 2,300 Miles
March 14 | United States Geological Survey
Monitoring Alaska*s Remote and Restless Bogoslof Volcano
March 14 | United States Geological Survey
Kilimanjaro*s Iconic Snows Mapped in Three Dimensions
March 13 | EOS Earth and Space Science News
The Real Cause of Coal*s Collapse
March 12 | U.S. News and World Report
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