|Searched for: GEM Subject is Science -- Earth science
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This guide provides illustrated descriptions of 46 common and important varieties of igneous, sedimentary, and metamorphic rock found in the San Francisco Bay region. Rock types are described in context of their...
This article provides a brief introduction to the processes of weathering and erosion in desert environments. Topics include the differences in the way these processes proceed in wet and arid environments, the role of...
This report describes the results of a major United States Geological Survey (USGS) geologic and oceanographic study of the Gulf of the Farallones, adjacent to the San Francisco Bay region. The first of its kind, the...
This portal provides access to maps, data, and other information on the distribution and frequency of natural hazards in the United States. The material is arranged into seven categories: earthquakes, floods, hurricanes...
This guide provides introductory information about rocks and minerals. Topics include some of the common rock-forming minerals, what rocks are made of, and where they come from (the three basic rock types). There are...
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