Yellowstone Volcano Observatory is an instrument-based monitoring program designed for observing volcanic and earthquake activity in the Yellowstone National Park region. This website provides information about its geology, history,...

Discusses the problems associated with landslides, where they occur, and why they occur.

This is a comprehensive website featuring how to build a model that illustrates sea-floor spreading and subduction. It has diagrams and pictures reviewing major geological concepts.

On this real-time site, the U.S. Geological Survey shares LANDSAT satellite images. The LANDSAT Program is managed by NASA and the U.S. Geological Survey.

This page discusses the presence of arsenic (chemical symbol As) in ground water in the United States. Also provides many links to other sites about arsenic (especially in drinking water.)

You will find this list of questions interesting and amusing. "Things like, "Is salt water used for anything in the U.S.?," and How can we have a 100-year flood two years in a row?", are found on this this. Click Home to access the site...

Wells are extremely important to all societies. Find out how wells are dug today and peruse the list of the different types of wells and the methods used to dig them. Click Home to access the site in Spanish.

The United States Geological Survey offers a complete look at water science in glossary form. Take advantage of the topic guides at the top of the site. You'll find great maps, clipart and activities centers. Click Home to access the...

Photos of the principal gemstones produced in the United States, including an introduction to historical and other background information for each one.

View near-real-time volcano monitoring data using the Find a U.S. Volcano menu above.

Resource provides a description of the topography of the Basin and Range province focusing on its fault history and water drainage system.

This site allows anyone with a question about geology to ask a USGS scientist. Contains links to other geology resources.

This site from USGS provides several activities to help understand the interrelationships among earth surface processes, ecological systems, and human activities. Also included are links to new findings and programs concerning Earth...

The U.S. Geological Survey (USGS) scientists are assessing hazards at many of the almost 70 active and potentially active volcanoes in the United States. In this article, learn how they are closely monitoring activity at the most...

Project ideas for environmental science issues, and links to homework help in geology, biology, geography, and hydrology.

Details regarding the geology of national parks in the United States.

Types of volcanic eruptions are named after actual volcanoes. View the eruptions of these volcanoes.

This site provides historic images of the expanding frontier taken by military and private citizens from 1861-1912.

Describes what a volcano landslide is, how they occur, the effects of these landslides, and case studies.

This is a website to learn not only about the inner and outer core, but also about the crust and the mantle of the interior of the earth.

Check out this animated site of a hydroelectric generator. There is a picture of a real generator along with a description of how it works.

Through the wizardry of online cams, you can view major volcanos around the world.

A very informative site, which is provided for by the U.S. Geological Survey, on how to write hydrologicic reports.

This site has a good description of what this particular type of map represents. It also explains the colors and letter symbols, faults, and strike and dips.