Medina Group

The Medina Group or Cataract Group is a geologic group in New York. It dates to the Silurian period. The group includes the Whirlpool Sandstone, Power Glen Shale, Devils Hole Sandstone, Grimsby Formation, Thorold Sandstone, Cambria Shale, Cabot Head Shale and Kodak Sandstone.^[1]

Medina Group
Stratigraphic range: Silurian
Outcrop of the Medina Group in Upstate New York
Type	Group
Sub-units	Whirlpool Sandstone Power Glen Shale Devils Hole Sandstone Grimsby Formation Thorold Sandstone Cambria Shale Kodak Sandstone[1]
Location
Region	New York
Country	United States