Description: Geologic formations index map. A layer that outlines the source maps compiled to make the Geologic Formations layer. It is a visual index that contains sources of map information.
Name: PFYC Geologic Formation Polygons 577K or closer
Display Field: PFYC_CLASS_CD
Type: Feature Layer
Geometry Type: esriGeometryPolygon
Description: Geologic coverage. Contains polygon boundaries between mappable geologic units and polygon codes for the mappable geologic units. Contains values for the Potential Fossil Yield Classification (PFYC) for ranking the potential of a geologic unit to produce scientifically significant fossils. Also contains fields for geologic ages and sort codes for sorting the units by time. Detailed documentation on the mapped units can be found in the accompanying state generated reports. Additional fields were added to the source data including earliest geologic age, latest geologic age, PFYC justification, PFYC rank (1-5), and a coded representation for the standardized BLM coloring scheme for PFYC maps.