Mineral Resources On-Line Spatial Data
Mineral Resources > Online Spatial Data > Geology > by state > New York
|Geologic age||Upper Silurian|
|Original map label||Sl|
|Comments||part of Lockport Group 0-75 ft. (0-23 m). Secondary unit description from USGS Lexicon website (ref. NY046) and reference NY030: Farmers Mills Bed (new name) occurs in the uppermost Ilion [misspelled Illion] Formation, transitional into the overlying Vernon Formation of the Salina Group in eastern NY. The black shale horizon contains a rich eurypterid fauna identical to that found in the type region of the Pittsford Bed of the Vernon Formation, western NY. Author transfers this uppermost portion of the Ilion Formation to the Salina Group and suggests that perhaps the entire Ilion should be included in the Salina. . [Usage of the Ilion in this report is in conflict with Art. 28(b) of the NACSN, which states "* * * a formation or its parts may not be assigned to two vertically adjacent groups."] (Ciurca, 1990).|
|Primary rock type||black shale|
|Secondary rock type|
|Other rock types|
Sedimentary > Clastic > Mudstone > Shale > Black-shale
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.
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.
|Geographic coverage||Cayuga - Genesee - Herkimer - Madison - Monroe - Niagara - Oneida - Onondaga - Orleans - Oswego - Wayne|
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