This site contains 22 questions on the topic of earthquakes, which covers seismic waves, earthquake characteristics, and earthquake magnitudes. This is part of the Principles of Earth Science course at the University of South Dakota. Users submit their answers and are provided immediate verification. Full description.

This site covers the four main types of faults (not including growth faults): the normal fault, reverse fault, transcurrent (strike-slip) fault, and thrust fault. Animations show the type of movement for each different type of fault. There is a section on the initial stage of a landform, containing a diagram of a graben and horst system. Also included are photographs of fault scarps along Hebgen Lake, ... Full description.

This visualization tool aids researchers and educators in understanding the tectonic activity of our planet for the past 1 million years. DTAM is a Geographical Information System (GIS) that displays a realistic synoptic view of present global tectonism by filling in the cartographic gap between conventional geological maps and plate reconstruction maps. This integrative technique provides a new and ... Full description.

The objective of this activity is to allow students to manipulate real data and understand how such data are interpreted and used in support of a theory. The concepts studied are maps, earthquakes, and plate tectonics, particularly a subduction zone plate boundary. The student will learn or be refreshed on using latitude and longitude for mapping purposes. The activity should be used in a unit on ... Full description.

This sequence of graphics illustrates how canyons on Mars were formed, looking at interior geologic processes. Full description.

The Craters of the Moon lava field covers 618 square miles and is the largest young basaltic lava field in the conterminous United States. Features include maps, photographs, related links, visitor information, and resources for teaching geology with National Park examples. The park geology section discusses the park's volcanic history and structural geology, as well as the various sites at the park, ... Full description.

Wind Cave National Park includes one of the world's longest and most complex caves and 28,295 acres of mixed-grass prairie, ponderosa pine forest, and associated wildlife. The cave is well known for its outstanding display of boxwork, an unusual cave formation composed of thin calcite fins resembling honeycombs. Features include park geology information, maps, photographs of cave formations, related ... Full description.

Timpanogos Cave National Monument, in the Wasatch Mountains, features spectacularly decorated caverns, each of which has unique colors and formations. Features of the site include park geology information, maps, photographs of cave formations, related links, and visitor information. The park geology section discusses the caves' geologic history, structural geology, and details the discovery of the ... Full description.

Jewel Cave National Monument feaures the third longest cave in the world; airflow within its passages indicates a vast area yet to be explored. Cave tours provide opportunities for viewing this pristine cave system and its wide variety of rock formations. Features include park geology information, maps, related links, and visitor information. The park geology section discusses the history of the park's ... Full description.

Carlsbad Caverns National Park has been designated as a world heritage site because of its unique and surprising geology. Site features include park geology information, maps, photographs, related links, and visitor information. The park geology section discusses the caverns' geologic history, mineral formations, and preservation. The maps section includes a map of the Carlsbad Caverns National Park ... Full description.