This data set is a portion of a statewide geology database, which is being compiled by the U.S. Geological Survey's National Surveys and Analysis (NSA) project, whose goal is to compile geologic, geochemical, geophysical, and other data.
This data set has been compiled from a variety of sources, ranging from state and regional geologic maps to large-scale field mapping. Locally, maps from differing sources were incompatible at their boundaries, resulting in some unit boundaries shown as straight lines, reflecting the boundary of the source map.
Supplemental attribute tables included with this data set, contain descriptive information of each geologic unit. A user may use items SOURCE and CLASS to retrieve information about the original units from which these generalized units were formed.
NOTE: Because of the limitations of common GIS fonts, the letters "Mz" are substituted for the standard symbol for "Mesozoic."
HFS - contact metamorphism, hornfels
Q - queried unit