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.)
At this site from USGS you can view pictures and resources on the volcanoes located in the Cascade Mountain Range. Experience their beauty and splendor as you learn more about these volcanic mountains.
This resource has a topographic map that tells you where things are and how to get to them. Use this site to help you use a map and compass to determine your location.
This large U.S. Geological Survey site offers a look at the age of the earth, how radiometric dating is used to calculate it, the major divisions of geologic time, and the classification and use of fossils.
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.
A massive amount of information about groundwater. Topics covered include groundwater basics, humans and groundwater, groundwater quality, and its place in the water cycle. Includes true-and-false quiz and a Q&A section, as well as a large gallery of photographs, maps, and helpful illustrations. There are also links to data and tools.
What is groundwater? Where does it fit into the water cycle? With the aid of a simple illustration, one is able to learn more about this topic. Includes link to a true-and-false quiz.
Learn more about the hot spot theory developed in 1963 by the Canadian geophysicist J. Tuzo Wilson. Diagrams help you visualize the way hot spots formed geologic structures such as the Hawaiian Islands.
The USGS gives an overview of the amount of water on Earth and where it is located. It gives a few interesting facts about the Earth's supply of water. Click Home to access the site in Spanish.
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.
Download a movie about the 1982 landslides of the San Fransisco Bay Area. Shows many devastating stories, scientific discoveries, and the destruction the landslides caused. [58:27]