Materials presented here outline basic concepts related to groundwater, answering questions like "What is groundwater?" and "What is an aquifer?" More detailed topics include groundwater quality, sources of contamination, engineering problems presented by groundwater, and safeguards to the groundwater supply. A bibliography and links to other water-related sites are included. A French translation ... Full description.

This site contains slide shows and virtual field trips of Yellowstone National Park. There are several slide shows to chose from, including wolves of Yellowstone, bear research, fire ecology, the history of Yellowstone and the influence of art on Yellowstone Park. Each program features slides containing text and photographs. There is also an orientation slide show about the National Park system. More ... Full description.

The basic information and terms covered on this site are associated with groundwater, including aquifers (confined and unconfined), saturation zones, the water table, impermeable layers, the water cycle (hydrologic cycle), discharge, and recharge. There is a list of groundwater facts and diagrams of two types of aquifers along with a typical groundwater system. Information on contamination includes ... Full description.

This site provides an introduction to the Missouri Springs of the Ozarks, a series of large springs that occur south of the Missouri River along the Ozark Uplift. There is general information on springs, including what they are, how they form, and their connection to the groundwater system. Photographs and brief descriptions are provided for the twenty largest springs in the state. There is also a ... Full description.

This National Park Service (NPS) website contains details about Craters of the Moon National Monument in Idaho. It discusses the history of the area, geology of the monument, geologic history, habitats, vegetation and wildlife present in this region. An education section includes a teacher's guide containing geologic activities for the classroom about topics such as earth history, hot spots, volcanoes ... Full description.

This guide provides an introduction to the glacial landforms and other complexly eroded features seen in Grafton Notch State Park, which is located in southwestern Maine. There is a detailed discussion of the glacial history of the area, which features steep gorges, waterfalls, eskers, an ancient glacial lake, and other landforms superimposed on a terrain of Silurian metamorphic rocks and Devonian ... Full description.