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General Geology Articles and Information

RocksRocks Rocks Galleries of igneous, sedimentary and metamorphic rock photos with descriptions. What Geologists DoWhat Does a Geologist Do? What Does a Geologist Do? Information and two videos about the relevance of geology today. Methane HydrateMethane Hydrate Methane Hydrate deposits contain more fuel value than all other fossil fuels combined. Geologic Time ScaleGeologic Time Scale Divisions of Geologic Time USGS periodically revises rock unit names and age estimates.
What Are Minerals?What Are Minerals? Minerals are the building blocks of our society. We use items made with them every day. What Is Earth Science?What Is Earth Science? What Is Earth Science? The study of Earth and its neighbors in space. Learn more! Plate TectonicsPlate Tectonics Plate Tectonics Articles, theory, plate diagrams, plate maps and teaching ideas. TroglobitesTroglobites Troglobites are creatures that have adapted to a permanent life in the darkness of a cave.
Gold History and UsesGold History and Uses Gold A history of gold uses, mining and prospecting over thousands of years. Maps Of PangaeaPangaea Maps Pangaea Maps A sequence of maps shows how a large supercontinent fragmented. Great Rift ValleyGreat Rift Valley The East Africa Rift System Learn about the complex East Africa Rift Valley system. Sliding RocksSliding Rocks Sliding Rocks - Racetrack Playa How these rocks slide across a dry lake bed is a mystery.
VolcanosVolcanos Volcanos Articles about volcanoes, volcanic hazards and eruptions past and present. Diamonds from Coal?Diamonds from Coal? Diamonds from Coal? They form under several conditions that rarely involve coal. Grand CanyonHow Old is the Grand Canyon? How Old is the Grand Canyon? Wayne Ranney explores the age of the Grand Canyon. What is a Geyser?What is a Geyser? What is a Geyser? Photos of geysers from around the world. Causes, height and more.
Geology ToolsGeology Tools Geology Tools Available are pick, chisel and crack hammers, rock chisels, goggles and more. Salt GlaciersSalt Glaciers Salt Glaciers are masses of salt that flow downslope under their own weight. Bottled WaterBottled Water The Geology of Bottled Water It costs 1000x as much as tap water. What are you getting? San Andreas FaultWhat is the San Andreas Fault? What is the San Andreas Fault? Map, photos and description of the fault by Dr. David Lynch.
Bear AttacksBear Attacks Bear Attacks Knowing how to react to a bear encounter and attack could save your life. Dowsingdowsing Dowsing is a method used to find underground water that is rejected by most geologists. LandslidesLandslides Landslides A USGS fact sheet about landslides and events that trigger them. Roadside GeologyRoadside Geology Roadside Geology Guides Learn about the Geology of your favorite state as seen from the road.
What is a Maar?What is a Maar? What is a Maar? The second most common volcanic landscape feature on Earth. Rare Earth ElementsRare Earth Elements REEs Special metals used in cell phones, DVDs, batteries, magnets & many other products. Green River FossilsGreen River Fossils Spectacular Fossils of the Green River Formation. Some of the world\'s best fossil fish. Salt DomesSalt Domes Salt Domes are columns of salt that move upwards because of the salt\'s low specific gravity.
Yosemite GlaciersYosemite Glaciers Yosemite Glaciers There are two active glaciers in Yosemite - but they are slowly melting away. Air Bubbles in AmberAir Bubbles in Amber Bubbles in Amber Cretaceous oxygen levels determed from air bubbles trapped in amber. Selenga RiverSelenga River The Selenga River delivers most of the water to Lake Baikal, the largest lake in the world. Rock GlaciersRock Glaciers Rock Glaciers - Masses of ice, snow, rock, mud and water that slowly flow down slope.
Homeowner InsuranceHomeowner\'s Insurance and Geologic Hazards Homeowner\'s Insurance and Geologic Hazards Most policies do not cover geologic hazards. What is a Hydrograph?What is a Hydrograph? What is a Hydrograph? Charts that display the change of a hydrologic variable over time. Stream GagingStream Gaging Stream Gaging Stations Used by hydrologists to monitor streams or other water bodies.  

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