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Attributes for NHDPlus Version 2.1 Flowlines for the Conterminous United States:Lithology

Published by U.S. Geological Survey | Department of the Interior | Metadata Last Checked: July 18, 2025 | Last Modified: 20230802
This dataset contains generalized lithologic classes (rocktypes) as reassigned from the USGS state geologic map compilation for the conterminous United States (Anning and Ator, 2017; Schweitzer, 2011). Lithology was classified into 12 generalized categories and assigned to the catchments of the NHDPlusV2.1 network as a fraction of the unit within the catchment.

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