Geologic units in Elkhart county, Indiana

Ellsworth Shale (Late Devonian) at surface, covers 0.1 % of this area: Ellsworth Shale
Lithology: shale; siltstone; sandstone
Ellsworth Shale (Devonian-Mississippian) at surface, covers 78 % of this area: Ellsworth Shale - Green shale; some black shale in lower part
Lithology: shale; black shale
Coldwater Shale (Mississippian) at surface, covers 0.5 % of this area: Coldwater Shale
Lithology: shale; limestone; dolostone (dolomite); sandstone; siltstone
Coldwater Shale (Mississippian) at surface, covers 15 % of this area: Coldwater Shale - Mostly gray shale
Lithology: shale
Antrim Shale (Devonian) at surface, covers 6 % of this area: Antrim Shale - Black shale; gray shale and limestone in lower part
Lithology: black shale; shale; limestone