Genesee Formation

Genesee Formation (Group)
Genesee Formation (Group)
Stratigraphic range: Frasnian
Type	Formation
Unit of	Frasnian
Sub-units	West River Shale Member; Genundewa Limestone Member; Ithaca Member; Renwick Shale Member; Sherburne Flagstone Member; Penn Yan Formation; Geneseo Shale;
Underlies	Sonyea Group
Overlies	Tully Limestone
Thickness	9' to 900' generally thinning westward.
Lithology
Primary	Shale
Other	Black Shale, Siltstone and Limestone
Location
Region	New York, Pennsylvania, West Virginia
Country	United States
Type section
Named for	Genesee, NY
Named by	de Witt and Colton, 1959, p. 2815

The Genesee Formation (Group) is a geologic formation in New York. It is equivalent the Harrell Shale in Pennsylvania. It date back to the Upper Devonian period.^[1] It is the basal unit of the Frasnian and Upper Devonian period. The Genesee Formation was defined by de Witt and Colton, 1959 as all strata between the Middlesex Unit of the Sonyea Group and the Tully Formation, where present or the Moscow Formation where the Tully is not present.^[2]

^ "Genesee Group". United States Geological Survey. Retrieved 2015-09-25.
^ De Witt, Wallace; Colton, George Willis (1978). "Physical stratigraphy of the Genesee Formation (Devonian) in western and central New York". Professional Paper. doi:10.3133/pp1032a. ISSN 2330-7102.

[USGSGeneseeGroup-1] "Genesee Group". United States Geological Survey. Retrieved 2015-09-25.

[:0-2] De Witt, Wallace; Colton, George Willis (1978). "Physical stratigraphy of the Genesee Formation (Devonian) in western and central New York". Professional Paper. doi:10.3133/pp1032a. ISSN 2330-7102.

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