USA USGIN 1:3M Lithology

Portrayal in which units are categorized according to the representative lithology from the CGI SimpleLithology vocabulary as specified by the representativeLithology_URI property in the underlying dataset. The data in this layer are portrayed based on lithology using the color scheme encoded in http://schemas.usgin.org/schemas/slds/LithologyCGI201001URI.sld. Lithology for polygons was assigned by intersecting polygon from Reed at al, 2005 with polygons in the state geologic map compilation for the lower 48 states by the USGS Mineral Resources division. In that map compilation, lithology was generalized to a major and minor rock type using the scheme documented in Ludington et al. 2007 (also known as LithClass 6). The LithClass6 categories were mapped into the CGI Simple Lithology vocabulary (see https://www.seegrid.csiro.au/wiki/CGIModel/ConceptDefinitionsTG) for OneGeology data integration by SM Richard. Lithology for polygons in Alaska, marine areas, Puerto Rico and Virgin Islands is based on mapping of lithogenetic categories from Reed et al, 2005 into the CGI simple Lithology vocabulary (see https://www.seegrid.csiro.au/wiki/CGIModel/ConceptDefinitionsTG) for OneGeology data integration by SM Richard. Lithology for polygons in Alaska, marine areas, Puerto Rico and Virgin Islands is based on mapping of lithogenetic categories from Reed et al, 2005 into the CGI simple Lithology vocabulary (see https://www.seegrid.csiro.au/wiki/CGIModel/ConceptDefinitionsTG) for OneGeology data integration by SM Richard.

Data quality information