Catskill Formation
（重定向自Catskill Delta）
![](/Images/godic/202501/03/Catskill10546.jpg")
![Point bar deposits in the Catskill Formation (Devonian) near North Bend, PA.](/Images/godic/202501/03/Meandering_catskill_MCR10546.JPG")
![Geologic cross section of upper to middle Devonian strata from Cherry Valley, New York south-southwest across the Allegheny Plateau and then along the Ridge-and-Valley Appalachians to Tennessee. The Catskill Formation is at the top.[1]](/Images/godic/202501/03/Geologic_cross_section_of_Devonian_strata_from_New_York_to_Alabama.svg0546.png")
The Devonian Catskill Formation or the Catskill clastic wedge is a unit of mostly terrestrial sedimentary rock found in Pennsylvania and New York. Minor marine layers exist in this thick rock unit (up to 10,000 feet). It is equivalent to the Hampshire Formation of Maryland, West Virginia, and Virginia.