Geologic units in Wayne county, New York

Vernon Formation (Upper Silurian) at surface, covers 26 % of this area

Dhale, dolostone.

Lockport Group (Upper Silurian) at surface, covers 23 % of this area

Oak Orchard and Penfield Dolostones; both replaced eastwardly by Sconondoa Formation-limestone, dolostone.

Camillus and Syracuse Formations (Upper Silurian) at surface, covers 21 % of this area

Shale, dolostone, gypsum, salt.

Irondequoit Limestone thru Kodak Sandstone (Lower Silurian) at surface, covers 11 % of this area

Includes: Irondequoit Limestone, Williamson Shale; Wolcott Furnace Hematite; Wolcott Limestone; Sodus Shale; Bear Creek Shale; Wallington Limestone; Furnaceville Hematite; Maplewood Shale; Kodak Sandstone.

Undifferentiated Medina Group and Queenston Formation (Upper Ordovician - Lower Silurian) at surface, covers 9 % of this area

Grimsby Formation-sandstones, shale; and Queenston Formation-shale, siltstone.

Decew Dolostone and Rochester Shale (Lower Silurian) at surface, covers 9 % of this area

Decew Dolostone and Rochester Shale

Clinton Group (Lower Silurian) at surface, covers 1 % of this area

Herkimer Sandstone; Kirkland Hematite; Willowvale Shale; Westmoreland Hematite; Sauquoit Formation-sandstone, shale; Oneida Conglomerate.

Queenston Shale (Upper Ordovician) at surface, covers < 0.1 % of this area

Queenston Shale