This site lists the basic descriptions of sedimentary, metamorphic and igneous rocks. Detailed information on each type of rock is also available. Detailed description of the composition, classification, and formation of sedimentary rocks. Sedimentary Rocks Laboratory , Georgia Perimeter College Read a thorough discussion of clastic, chemical, and organic sedimentary rocks.
Illustrations accompany each description.
Washington State University Learn more about sedimentary processes, environments of deposition in relation to different sedimentary rocks. Topics covered include depositional environments, chemical or mechanical weathering, deposition and lithification, and classification. Volcano World View a slide show about igneous rocks. A self guided tour of igneous rock photographs, showing hand samples and outcrops. Page also includes quiz with answer key.