Geologic units in Newton county, Indiana

Muscatatuck Group (Devonian) at surface, covers 34 % of this area

Limestone and dolomite

Wabash Formation (Silurian) at surface, covers 31 % of this area

Limestone, dolomite, and argillaceous dolomite

New Albany Shale (Devonian-Mississippian) at surface, covers 29 % of this area

Black and greenish-gray shale

Borden Group (Mississippian) at surface, covers 5 % of this area

Mostly siltstone; lenses of crinodial limestone in upper part. Much cherty and silty limestone and dolomite in northwest. NP, top of New Providence Shale

Raccoon Creek Group (Pennsylvanian) at surface, covers 1 % of this area

Mostly shale and sandstone; also includes thin beds of limestone, clay, and coal. B, Buffaloville Coal Member; LB, Lower Block Coal Member

Pleasant Mills Formation (Silurian) at surface, covers 0.2 % of this area

Dolomite, limestone, and argillaceous dolomite

New Albany Shale, Blocher Shale, Sylamore Sandstone, Selmier Shale, Sweetland Creek Shale, Grassy Creek Shale, Saverton Shale, and Louisiana Limestone (Middle Devonian (Givetian) to Upper Devonian (Fammenian)) at surface, covers < 0.1 % of this area

New Albany Shale, Blocher Shale, Sylamore Sandstone, Selmier Shale, Sweetland Creek Shale, Grassy Creek Shale, Saverton Shale, and Louisiana Limestone.

Ordovician rocks, undifferentiated (Silurian) at surface, covers < 0.1 % of this area

Shale and limestone; upper part of Maquoketa Group in deep buried valleys; Maquoketa to upper part of Knox Supergroup in Kentland area

Louisville Limestone through Brassfield Limestone (Silurian) at surface, covers < 0.1 % of this area

Sexton Creek Limestone at base in Kentland area and on cross-section

Borden Siltstone (Mississippian (Tourniaisian to Visean)) at surface, covers < 0.1 % of this area

Borden Siltstone, includes Chouteau Limestone in east-central Illinois.

Silurian System undivided (Silurian (Llandovery to Pridoli)) at surface, covers < 0.1 % of this area

Silurian System undivided, includes Sexton Creek Limestone, St. Clair Limestone, and Moccasin Springs Formation in southern Illinois; includes Wilhelmi Formation, Elwood Dolomite, Kankakee Dolomite, Joliet Dolomite, Sugar Run Dolomite, and Racine Dolomite in northeastern Illinois; includes Mosalem, Tete des Morts, Blanding, Sweeney, Marcus, and Racine Dolomites in northwestern Illinois.

Muscatatuck Group (Middle Devonian (Eifelian to Givetian)) at surface, covers < 0.1 % of this area

Muscatatuck Group, includes Grand Tower Limestone and St. Laurent (Alto and Lingle) Formation in southern Illinois; includes Detroit River Formation, Wapsipinicon Limestone, and Cedar Valley Limestone in northern and western Illinois.