Geology of the United States of America
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North_america_rock_types.jpg
North_america_rock_types.jpg
The geology of the United States, like most topics of scientific study, is undergoing progressive investigation by numerous public- and private-sector earth scientists, academicians, and students. In that regard, the detailed picture is subject to revision and change as knowledge advances. At present, a very good overview of USA geology can be found at the United States Geological Survey web link, below.
External links
- A Tapestry of Time and Terrain: The Union of Two Maps - Geology and Topography (USGS) (http://tapestry.usgs.gov/Default.html)
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