Geologic units in Chenango county, New York

Genesee Group (Upper Devonian) at surface, covers 36 % of this area

West River Shale; Genundewa Limestone; Penn Yan and Geneseo Shales; all except Geneseo replaced eastwardly by Ithaca Formation-shale, siltstone and Sherburne Siltstone.

Sonyea Group (Upper Devonian) at surface, covers 21 % of this area

In west: Cashaqua and Middlesex Shales. In east: Rye Point Shale; Rock Stream ("Enfield") Siltstone; Pulteney, Sawmill Creek, Johns Creek, and Montour Shales.

Oneonta Formation (Middle - Upper Devonian) at surface, covers 16 % of this area

Shale, sandstone, conglomerate.

Unadilla, Laurens, New Lisbon, and Gilboa Formations (Middle Devonian) at surface, covers 16 % of this area

Shale, siltstone, sandstone.

Moscow Formation (Middle Devonian) at surface, covers 4 % of this area

In west: Cooperstown and Portland Point shale and sandstone Members; In east: ""Manorkill"" and Portland Point shale and sandstone Members.

Moscow Formation (Middle Devonian) at surface, covers 2 % of this area

In west: Windom and Kashong Shales, Menteth Limestone Members; In east: Cooperstown Shale Member, Portland Point Limestone Member.

Panther Mountain Formation (Middle Devonian) at surface, covers 2 % of this area

Shale, siltstone, sandstone.

Ludlowville Formation (Middle Devonian) at surface, covers 0.9 % of this area

In west: Deep Run Shale, Tichenor Limestone, Wanakah and Ledyard Shales, Centerfield Limestone Members. In east: King Ferry Shale and other members, Stone Mill Sandstone Member.

Upper Walton Formation (Upper Devonian) at surface, covers 0.8 % of this area

Shale, sandstone, conglomerate.

Tully Limestone (Middle Devonian) at surface, covers 0.7 % of this area

Tully Limestone

Enfield"" and Kattel Formations (Upper Devonian) at surface, covers 0.5 % of this area

Shale, siltstone, sandstone.

Beers Hill, Dunn Hill, Millport, and Moreland Shales; Grimes Siltstone (Upper Devonian) at surface, covers 0.3 % of this area

Beers Hill, Dunn Hill, Millport, and Moreland Shales; Grimes Siltstone.

Unadilla Formation (Middle - Late Devonian) at surface, covers 0.3 % of this area

Shale, siltstone.

Skaneateles Formation (Middle Devonian) at surface, covers 0.1 % of this area

In west: Levanna Shale and Stafford Limestone Members; In east: Butternut, Pompey, and Delphi Station Shale Members, Mottville Sandstone Member.

Lower Walton Formation (Upper Devonian) at surface, covers < 0.1 % of this area

Shale, sandstone, conglomerate.

Beers Hill, Dunn Hill, Millport, and Moreland Shales (Upper Devonian) at surface, covers < 0.1 % of this area

Beers Hill, Dunn Hill, Millport, and Moreland Shales.