General Geology Articles and Information

What Does a Geologist Do? Information and two videos about the relevance of geology today.

Land Below Sea Level - Did you know that dozens of land locations are below sea level?

Divisions of Geologic Time USGS periodically revises rock unit names and age estimates.

Minerals are the building blocks of our society. We use items made with them every day.

Plate Tectonics Articles, theory, plate diagrams, plate maps and teaching ideas.

Waterproof Paper - Don't take chances with your field notes and maps. Use waterproof paper.

What Is Earth Science? The study of Earth and its neighbors in space. Learn more!

Rocks Galleries of igneous, sedimentary and metamorphic rock photos with descriptions.

Pangaea Maps A sequence of maps shows how a large supercontinent fragmented.

Sliding Rocks - How these rocks slide across a dry lake bed is a mystery.

Volcanoes Articles about volcanoes, volcanic hazards and eruptions past and present.

Dowsing is a method used to find underground water that is rejected by most geologists.

What are Glaciers? Learn how glaciers form, flow, advance, retreat, and change over time.

What is a Maar? The second most common volcanic landscape feature on Earth.

What is the San Andreas Fault? Map, photos and description of the fault.

REEs Special metals used in cell phones, DVDs, batteries, magnets & many other products.

What is a Geyser? Photos of geysers from around the world. Causes, height and more.

How Old is the Grand Canyon? Wayne Ranney explores the Canyon*s age.

Gold A history of gold uses, mining and prospecting over thousands of years.

The East Africa Rift System Learn about the complex East Africa Rift Valley system.

Roadside Geology Guides Explain the Geology of your state as seen from the road.

The Geology of Bottled Water It costs 1000x as much as tap water. What are you getting?

Bear Attacks Knowing how to react to a bear encounter and attack could save your life.

Landslides A USGS fact sheet about landslides and events that trigger them.

Gold Pans and Panning Kits - classifiers, snuffer bottles. Learn how to pan for gold!

Geology Tools - Hammers, field bags, hand lenses, maps, hardness picks, gold pans.

Diamonds from Coal? They form under several conditions that rarely involve coal.

Salt Glaciers are masses of salt that flow downslope under their own weight.

Spectacular Fossils of the Green River Formation. Some of the world\'s best fossil fish.

Bubbles in Amber Cretaceous oxygen levels determed from air bubbles trapped in amber.

Salt Domes - Salt structures that are often associated with oil and natural gas.

Rock Glaciers - Masses of ice, snow, rock, mud and water that slowly flow down slope.

Methane Hydrate deposits contain more fuel value than all other fossil fuels combined.

Stream Gaging Stations Used by hydrologists to monitor streams or other water bodies.

What is a Hydrograph? Charts that display the change of a hydrologic variable over time.

Troglobites are creatures that have adapted to a permanent life in the darkness of a cave.

Take Great Cell Phone Photos - Low-cost, easy-to-use lenses will improve your photos.

The Selenga River delivers most of the water to Lake Baikal, the largest lake in the world.

Yosemite Glaciers There are two active glaciers in Yosemite - both slowly melting away.

Yosemite Rock Fall Photos A photo sequence of a rockfall and debris avalanche by Herb Dunn.

Homeowners Insurance and Geologic Hazards Most policies do not cover geologic hazards.