This map has been compiled from existing mapping, without generalizations, and new or revised data has been added where available.
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.
Supplemental attribute tables included with this data set contain additional 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 "Tr" and "Mz" are substituted for the standard symbols for "Triassic" and "Mesozoic".
Q - queried unit