Muscatatuck Group

The Muscatatuck Group is a Middle Devonian Aged unit found in Illinois, Indiana and Kentucky. It is characterized by being predominantly made up of Dolomite and limestone.

Stratigraphy
The Muscatatuck underlies the New Albany Shale throughout of its extent, except in Northern Indiana where it underlies the Antrim Shale.

The North Vernon Limestone is a geologic formation in Indiana. Also called the Sellersburg Limestone, this term however is no longer in use. Originally called "Corniferous Limestone" it was defined as the unit between the New Albany Shale and the Jeffersonville Lime. The North Vernon has two members.

The Beechwood Limestone Member. Defined by its Crinoidal Beds.

The Silver Creek Member is massive and mostly grey, often argillaceous.

The Speed member is a shaley limestone.

The Jeffersonville Limestone is a coarse grained, dark gray, thick bedded, fossiliferous limestone.

Industrial Products
Quarries in Pulaski and Shelby Counties produce Agricultural lime, agragrate (crushed stone) and rip rap. Also mined are Portland cement products, industrial lime and Pugmill material.

Several counties produce oil from the Muscatatuck in Indiana.