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Rock Formations
Middle TN - Carters

Field Guide to outcrops include:

Southern Hills Hospital

The Carters Formation is part of the Stones River Group of rocks, and is dated to the Ordovician Period.

Contains upper and Lower members, seperated by T3 Bentonite clay. Upper member is thin bedded., light gray shaley limestone about 10 feet thick. Lower member is massive, light grey fine grained limestone about 50 feet thick and contains T2 and T1 Bentonite clays. Weathers to brown plastic clay about 4 feet thick wtih some sink holes. Oucrops extensively in Central Basin.

- H.R. Beaver,
geological engineer