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Geology
Study of the planet earth, its composition, structure, physical and chemical processes, and history since its origin.
Subtopics:
Economic geology (160 items)
Geochronology (23 items)
Geomorphology (41 items)
Hydrogeology (37 items)
Marine geology (52 items)
Mineralogy (15 items)
Petrology (3 items)
Sedimentology (19 items)
Stratigraphy (7 items)
Structural geology (7 items)
Volcanology (61 items)

Subsurface maps (93 items)
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Results 151 - 160 of 470 listed by similarity [list alphabetically]
Coal on federal lands [More info]
Information on coal on federally owned public lands with links to database and maps for federal coal ownership of the United States, Rocky Mountains and Great Plains, and Colorado Plateau.
Coal Resource Classification System of the U.S. Bureau of Mines and U.S. Geological Survey [More info]
A report published jointly by the U.S. Bureau of Mines and U.S. Geological Survey giving definitions of coal resource classification terms.
Coal Resource Classification System of the U.S. Geological Survey [More info]
The classification system by which coal is classified into resource/reserve base/reserve categories on the basis of the geologic assurance of the existence of those categories and on the economic feasibility of their recovery.
Coal-bed gas resources of the Rocky Mountain region [More info]
Summary of the technically recoverable coal-bed gas resources of the Rocky Mountain region.
Coal-bed methane: potential and concerns [More info]
Fact sheet in PDF format on occurrence and recoverability of coalbed methane in the U.S. and related environmental concerns.
Coalbed methane studies [More info]
Methane (natural gas), while frequently developed with petroleum, also occurs in association with coal and accounts for about 7.5 percent of U.S. natural gas production. Links to digital publications on coalbed methane.
Coastal change hazards digital library [More info]
Online catalog of reports and data on coastal change hazards, indexed by author, agency, project, location, feature type, and topic
Compilation of various geologic time scales [More info]
Preliminary report comparing various geologic time scales. Text is HTML or plain text format, and colored compilation chart in Excel format.
Contamination in Fractured Rock Aquifers [More info]
Overview of fractured rock research aimed at understanding the movement of water through fracture networks, and characterize field conditions influencing contaminant migration. Includes programs and publications.
Continental shelf GIS for the Monterey Bay National Marine Sanctuary [More info]
Interactive maps of the continental shelf of the Monterey Bay National Marine Sanctuary with GIS layers for sediment data, bathymetry, geology, bathymetry, sonar imagery, and tectonics.
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