A large selection of rotary and vibratory rock tumblers plus tumbling rough, grit, polish, tumbling media and finished stones.

Offers geological information about the state with descriptions, illustrations, and photographs on earthquakes and hazards, dinosaurs and fossils, rocks and minerals, oil and energy.

Provides information on geologic features of our national parks.

Geological survey for the province of Alberta, Canada. This government site provides information on its publications, library and geological staff. Site also has general geology resources.

Provides information on geology including a dictionary. Contains several related links regarding energy, plate tectonics, regional geology, and more.

"The Union of Two Maps - Geology and Topography". Contains information about the topography and geology of the continental United States along with geologic time. Maps, timeline, game and movie.

A study of the changing forms of land and water over the past 1100 million years. Includes chapters of earth history, 3D animated and movable paleoglobes, atlas, and available merchandise.

Collection of descriptions, illustrations, and photographs cover basic geology, mineralogy, geochemistry analogs and methods, naming strategraphic units, the geologic time scale, dinosaur facts.

Nonprofit organization, composed of scientists from industry and the government, which focuses on the advancement of geology. List of featured articles, a job seekers' section, and links.

Information about geological research and exploration in North Africa. Includes an online database featuring recent research reports, journal articles, and books based on research conducted in North Africa. Available in Arabic, French and English. ... see more

Information about the formation and weathering process of soil. Also includes ecology, composition, properties, and classification.

Professional society for earth scientists in the USA. Publications, meetings, member services, specialty divisions, and regional sections.

Easy-to-follow description of plate tectonics. Contains an interactive map of the earth, where users can view the locations of tectonic plates, spreading centers, and their relationship to volcanoes and earthquakes.

Helps students learn to identify minerals. Contains examples with general descriptions and hints for distinguishing each, as well as information about the rock type and its locality.

Contains information on mineral species with chemical composition, classification, crystallography, physical and optical properties. List of mineral species by crystal system, mineral species by chemical composition, mineral photographs.