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Geology of the United States of America
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.
Information are taken from Wikipedia, the open encyclopedia, to which contribute many volunteers from around the whole world. Texts are available under the following conditions GNU Free Documentation License.
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