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Lithogeochemical Character of Near-Surface Bedrock in the Connecticut, Housatonic and Thames River Basins

Summary

Type of release
ongoing release of a series of related datasets

Data Licence
Not Applicable

Content Licence
Creative Commons CCZero

Verification
automatically awarded

Release Date
15 March 2013
Modified Date
17 November 2014
Update Frequency
THERE ARE NO PLANNED CHANGES TO THIS DATA LAYER.
Publishers
U.S. Geological Survey, Department of the Interior
Identifier
lithogeochemical-character-of-near-surface-bedrock-in-the-connecticut-housatonic-and-thames-riv
Landing Page
http://catalog.data.gov/dataset/lithogeochemical-character-of-near-surface-bedrock-in-the-connecticut-housatonic-and-thames-riv

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Description

This data layer shows the generalized lithologic and geochemical (lithogeochemical) character of near-surface bedrock in the Connecticut, Housatonic, and Thames River Basins and several other small basins that drain into Long Island Sound from Connecticut. The area includes most of Connecticut, western Massachusetts, eastern Vermont, western New Hampshire, and small parts of Rhode Island, New York, and Quebec, Canada. Bedrock geologic rock formations are classified into 29 lithogeochemical rock units, based on the relative reactivity of their constituent minerals to dissolution and other weathering reactions and the presence of carbonate or sulfide minerals. The 29 lithogeochemical units can be summarized into 6 major categories: (1) carbonate-rich rocks, (2) carbonate-poor, clastic sedimentary rocks restricted to distinct depositional basins, (3) metamorphosed, clastic sedimentary rocks (primarily noncalcareous), (4) mafic igneous rocks and their metamorphic equivalents, (5) ultramafic rocks, and (6) felsic igneous and plutonic rocks and their metamorphic equivalents. Lithogeochemical rock units also are grouped into nine lithologic and physiographic provinces (lithophysiographic domains), which can be summarized into three major regions: (1) western highlands and lowlands, (2) central lowlands, and (3) eastern highlands.

General Information

Legal Information

This dataset has been created by US Government which means it is required to be in the public domain. However US copyright law only allows open access by US citizens, we have assumed the data is equivalently licensed as CC0 for the rest of the world as this is in the spirit of the US Government’s Open Data policy.

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