Rock Stream Formation Explained

Rock Stream Formation
Type:	Formation
Age:	Frasnian
Prilithology:	Siltstone
Otherlithology:	Shale
Unitof:	Sonyea Group
Underlies:	Cashaqua Shale
Overlies:	Pulteney shale

The Rock Stream Formation (or Rock Stream siltstone^[1]) is a geologic formation in New York. It preserves fossils dating back to the Devonian period.

See also

• List of fossiliferous stratigraphic units in New York

References

1. Web site: Sonyea Group . . USGS . 2015-09-17 .

• Web site: Fossilworks: Gateway to the Paleobiology Database. ((Various Contributors to the Paleobiology Database)). 17 December 2021. dmy-all.
• Web site: Geologic map of New York: Finger Lakes sheet. Rickard . L.V. . Isachsen . Y.W.. Fisher . D.W.. New York State Museum. 1970. 2015-09-17 .
• Bergin. M. J.. 1964. Bedrock Geology of the Penn Yan and Keuka Park Quadrangles New York. Geological Survey Bulletin . USGS. 1161-G. 22 September 2015.
• Schieber . J. . 1999 . Distribution and deposition of mudstone facies in the Upper Devonian Sonyea Group of New York . Journal of Sedimentary Research . SEPM Society for Sedimentary Geology . 69 . 909–925 . 22 September 2015 . 10.2110/jsr.69.909.