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General Geology Articles and Information


Igneous and Volcanic
Igneous and Volcanic Features an introduction to how these rocks occur below and above ground.Gifts That Rock
Gifts That Rock - What are the most popular gift items in the store?What Are Minerals?
Minerals are the building blocks of our society. We use items made with them every day.Geology Dictionary
Geology Dictionary - contains thousands of geological terms with their definitions.Land Below Sea Level
Land Below Sea Level - Did you know that dozens of land locations are below sea level?Geologic Time Scale
Divisions of Geologic Time USGS periodically revises rock unit names and age estimates.Plate Tectonics
Plate Tectonics Articles, theory, plate diagrams, plate maps and teaching ideas.What is a Maar?
What is a Maar? The second most common volcanic landscape feature on Earth.Sliding Rocks
Sliding Rocks - How these rocks slide across a dry lake bed is a mystery.What Geologists Do
What Does a Geologist Do? Information and two videos about the relevance of geology today.Rocks
Rocks Galleries of igneous, sedimentary and metamorphic rock photos with descriptions.Maps Of Pangaea
Pangaea Maps A sequence of maps shows how a large supercontinent fragmented.Volcanoes
Volcanoes Articles about volcanoes, volcanic hazards and eruptions past and present.Grand Canyon
How Old is the Grand Canyon? Wayne Ranney explores the Canyon*s age.Geology Tools
Geology Tools - Hammers, field bags, hand lenses, maps, hardness picks, gold pans.Gold History and Uses
Gold A history of gold uses, mining and prospecting over thousands of years.San Andreas Fault
What is the San Andreas Fault? Map, photos and description of the fault.Dowsing
Dowsing is a method used to find underground water that is rejected by most geologists.Rare Earth Elements
REEs Special metals used in cell phones, DVDs, batteries, magnets & many other products.What are Glaciers?
What are Glaciers? Learn how glaciers form, flow, advance, retreat, and change over time.What Is Earth Science?
What Is Earth Science? The study of Earth and its neighbors in space. Learn more!What is a Geyser?
What is a Geyser? Photos of geysers from around the world. Causes, height and more.Salt Glaciers
Salt Glaciers are masses of salt that flow downslope under their own weight.Bear Attacks
Bear Attacks Knowing how to react to a bear encounter and attack could save your life.Great Rift Valley
The East Africa Rift System Learn about the complex East Africa Rift Valley system.Roadside Geology
Roadside Geology Guides Explain the Geology of your state as seen from the road.Diamonds from Coal?
Diamonds from Coal? They form under several conditions that rarely involve coal.Green River Fossils
Spectacular Fossils of the Green River Formation. Some of the world's best fossil fish.Cell Phone Photos
Take Great Cell Phone Photos - Low-cost, easy-to-use lenses will improve your photos.Bottled Water
The Geology of Bottled Water It costs 1000x as much as tap water. What are you getting?Rock Glaciers
Rock Glaciers - Masses of ice, snow, rock, mud and water that slowly flow down slope.Air Bubbles in Amber
Bubbles in Amber Cretaceous oxygen levels determed from air bubbles trapped in amber.Landslides
Landslides A USGS fact sheet about landslides and events that trigger them.Stream Gaging
Stream Gaging Stations Used by hydrologists to monitor streams or other water bodies.Salt Domes
Salt Domes - Salt structures that are often associated with oil and natural gas.Methane Hydrate
Methane Hydrate deposits contain more fuel value than all other fossil fuels combined.Troglobites
Troglobites are creatures that have adapted to a permanent life in the darkness of a cave.Waterproof Paper
Waterproof Paper - Don't take chances with your field notes and maps. Use waterproof paper.Yosemite Rock Fall
Yosemite Rock Fall Photos A photo sequence of a rockfall and debris avalanche by Herb Dunn.What is a Hydrograph?
What is a Hydrograph? Charts that display the change of a hydrologic variable over time.Selenga River
The Selenga River delivers most of the water to Lake Baikal, the largest lake in the world.Yosemite Glaciers
Yosemite Glaciers There are two active glaciers in Yosemite - both slowly melting away.Gold Panning Kits
Gold Pans and Panning Kits - classifiers, snuffer bottles. Learn how to pan for gold!Homeowner Insurance
Homeowners Insurance and Geologic Hazards Most policies do not cover geologic hazards.