Austin Glen Formation (NYOag;3)

State	New York
Name	Austin Glen Formation
Geologic age	Middle Ordovician
Original map label	Oag
Comments	part of Trenton Group and Metamorphic Equivalents up to 8000 ft. (2400 m). Unit is also listed as part of part of Eugeosynclinal (Allochthonous) Sequence on printed map and uses a different color to map; however, on the digital map both units of Oag are mapped together. I followed the digital map and did not separate the unit into 2 provinces (the unit descriptions are identical).
Primary rock type	graywacke
Secondary rock type	shale
Other rock types
Lithologic constituents	Major Sedimentary > Clastic > Mudstone > Shale Sedimentary > Clastic > Sandstone > Graywacke
Map references	NYS Museum, NYS Geological Survey, NYS Museum Technology Center, 1999, 1:250,000 Bedrock geology of NYS, data is distributed in ARC/INFOr EXPORT format (with ".e00" extension) in 5 seperate files based on printed map sheets, http://www.nysm.nysed.gov/gis.html. [http://www.nysm.nysed.gov/gis.html.]
Unit references	D. W. Fisher; Y. W. Isachsen, L. V. Rickard, 1970, Geologic Map of New York State, consisting of 5 sheets: Niagara, Finger Lakes, Hudson-Mohawk, Adirondack, and Lower Hudson, New York State Museum and Science Service, Map and Chart Series No. 15, scale 1:250000.