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General Geology Articles and Information

Geologist\'s JobWhat Does a Geologist Do? What Does a Geologist Do? Information and two videos about the relevance of geology today. Geologic Time ScaleGeologic Time Scale Divisions of Geologic Time USGS periodically revises rock unit names and age estimates. RocksRocks Rocks Galleries of igneous, sedimentary and metamorphic rock photos with descriptions. 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! Great Rift ValleyGreat Rift Valley The East Africa Rift System Learn about the complex East Africa Rift Valley system. Diamonds from Coal?Diamonds from Coal? Diamonds from Coal? They form under several conditions that rarely involve coal. Gold History and UsesGold History and Uses Gold A history of gold uses, mining and prospecting over thousands of years.
What is a Geyser?What is a Geyser? What is a Geyser? Photos of geysers from around the world. Causes, height and more. Salt GlaciersSalt Glaciers Salt Glaciers are masses of salt that flow downslope under their own weight. Salt DomesSalt Domes Salt Domes are columns of salt that move upwards because of the salt\'s low specific gravity. Sliding RocksSliding Rocks Sliding Rocks - Racetrack Playa How these rocks slide across a dry lake bed is a mystery.
Plate TectonicsPlate Tectonics Plate Tectonics Articles, theory, plate diagrams, plate maps and teaching ideas. Bottled WaterBottled Water The Geology of Bottled Water It costs 1000x as much as tap water. What are you getting? What is a Maar?What is a Maar? What is a Maar? The second most common volcanic landscape feature on Earth. Roadside GeologyRoadside Geology Roadside Geology Guides Learn about the Geology of your favorite state as seen from the road.
Geology ToolsGeology Tools Geology Tools Available are pick, chisel and crack hammers, rock chisels, goggles and more. SnowflakesHow Do Snowflakes Form? How Do Snowflakes Form? They grow from a tiny particle but they might not reach the 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.
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. TroglobitesTroglobites Troglobites are creatures that have adapted to a permanent life in the darkness of a cave. Bear AttacksBear Attacks Bear Attacks Knowing how to react to a bear encounter and attack could save your life. Maps Of PangaeaPangaea Maps Pangaea Maps A sequence of maps shows how a large supercontinent fragmented.
Grand CanyonHow Old is the Grand Canyon? How Old is the Grand Canyon? Wayne Ranney explores the age of the Grand Canyon. LandslidesLandslides Landslides A USGS fact sheet about landslides and events that trigger them. VolcanosVolcanos Volcanos Articles about volcanoes, volcanic hazards and eruptions past and present. 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. Selenga RiverSelenga River The Selenga River delivers most of the water to Lake Baikal, the largest lake in the world. Air Bubbles in AmberAir Bubbles in Amber Bubbles in Amber Cretaceous oxygen levels determed from air bubbles trapped in amber. Yosemite GlaciersYosemite Glaciers Yosemite Glaciers There are two active glaciers in Yosemite - but they are slowly melting away.
Homeowner InsuranceHomeowner\'s Insurance and Geologic Hazards Homeowner\'s Insurance and Geologic Hazards Most policies do not cover geologic hazards.      

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