Geologic units in LaGrange county, Indiana

Coldwater Shale (Mississippian) at surface, covers 87 % of this area

Mostly gray shale

Ellsworth Shale (Devonian-Mississippian) at surface, covers 13 % of this area

Green shale; some black shale in lower part

Coldwater Shale (Mississippian) at surface, covers 0.3 % of this area

Coldwater Shale

Ellsworth Shale (Late Devonian) at surface, covers < 0.1 % of this area

Ellsworth Shale