In areas where this Geologic Unit thins it is also called the Black River Formation (undifferentiated).

[2] Large parts of the Black River have been dolomized (where the parent limestone CaCO3 has been turned into dolomite CaMg(CO3)2.)

[4] Due to fracturing and porosity naturally occurring with in the formation it servers as a gas reservoir throughout its reach.

Locally sand and silt maybe found in thin horizons especially in the eastern reaches of the unit.

[7] The Black River Group was deposited during a time when large parts of North America were a passive cratonic margin.

As Laurentia moved towards an island arc that it would eventually collide with the crust folded downward.

The Taconic Orogeny occurred to the east and this formed a basin, but further west the crust buckled up into an arch.

The Black River Group acts as a reservoir for natural gas and petroleum.

Gas and oil fields can be found in New York, Pennsylvania, Ohio, Indiana, Kentucky, Michigan, and Tennessee.