This web map service presents a geologic map of the United States, including Puerto Rico and the offshore exclusive economic zone, but not the Pacific Island territories. Data are from the Geologic Map of North America (scale 1:2500000, Reed et al., 2005), as digitized by Garrity and Soller (2009, USGS DDS 424) and Sherrod et al. (2007) compilation of the Geology of Hawai’i (scale 1:100000). Faults (5529 features) and non-faulted contacts (17304 features) are portrayed in separate layers. Three portrayals of the geologic unit outcrops are included, based on age, lithology, and lithostratigraphy (original map units). There are 13,132 polygons in the dataset for the layer; WMS getFeatureInfo requests for the polygon layers report GeoSciML Portrayal GeologicUnitView feature properties name, description, lithology, geologic history, along with CGI URI identifiers for representative lithology and age (representative, older bound, younger bound), URI for geologic unit type, and a URI identifying the metadata record for the dataset. The five (5) layers included in this service are:

1. USA_USGIN_3M_Contacts layer includes all depositional, intrusive, or metamorphic contact between units, but not faults.

2. USA_USGIN_3M_Faults layer includes all faults (GeoSciML shear displacement structures).

3. USA_USGIN_3M_Geologic_Age is a portrayal in which units are categorized according to the representative geologic age of the unit using the ICS 2009 geologic time scale.

4. USA_USGIN_3M_Lithology is a 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.

5. USA_USGIN_3M_Lithostratigraphy is a portrayal in which units are categorized according to the original map units defined in Reed et al. (2005).

Three layers for use with SLD portrayal. These have a single solid color for polygons and a single solid line styling for lines.

6. gsmlp2.0:geologicunitview

7. gsmlp2.0:sheardisplacementstructureview

8. gsmlp2.0:contactview

See metadata record http://metadata.stategeothermaldata.org/resource/4e6b8f72f7d6c3856f092c6b8501c570/html for more information on the dataset.