The Fort Payne Formation, or Fort Payne Chert, is a geologic formation found in the southeastern region of the United States. It is a Mississippian Period cherty limestone, that overlies the Chattanooga Shale, and underlies the St. Louis Limestone. To the north, it grades into the siltstone Borden Formation. It preserves fossils dating back to the Carboniferous period.
Ctenochelys is an extinct genus of marine turtle, which existed during the Cretaceous period, and lived in the shallow waters of the Western Interior Seaway. Its fossils have been found in the Ripley Formation and Mooreville Chalk of central Alabama, United States. It was first named by C.H. Sternberg in 1904, and contains two species, C. stenoporus and C. acris.
The Leipers Limestone is a geologic formation in Kentucky, Tennessee, Alabama and Georgia. It preserves fossils dating back to the Ordovician Period.
The Chepultepec Formation, is an Early Ordovician-age geological formation in the Appalachian regions of Eastern North America. Also known as the Chepultepec Dolomite, it is a unit of the Upper Knox Group, overlying the Copper Ridge Dolomite and underlying the Longview-Kingsport-Mascot sequence. The Chepultepec Formation is a primarily limestone and dolomite formation, the earliest formation of the Ordovician period in its area. Further north, it is equivalent to the Stonehenge Formation of the Beekmantown Group. The formation was first described from Allgood, Alabama, and has also been found in Tennessee and Virginia. Allgood was originally named "Chepultepec", providing its name to the formation as well. In Virginia, the Chepultepec Formation has a habit of forming large natural arches, including Natural Tunnel in Scott County and Natural Bridge in Rockbridge County.
The Sequatchie Formation is a geologic formation in Alabama, Georgia, and Tennessee. It preserves fossils dating back to the Ordovician period.
The Bucatunna Formation is a geologic formation in Alabama. It preserves fossils dating back to the Paleogene period.
The Fort Gaines Formation is a geologic formation in Alabama. It preserves fossils dating back to the Paleogene period.
The Red Bluff Formation is a geologic formation in Alabama. It preserves fossils dating back to the Paleogene period.
The Chickamauga Formation is a geologic formation in Alabama. It preserves fossils dating back to the Ordovician period.
The Tuscaloosa Formation is a geologic formation in Alabama. It preserves fossils dating back to the Cretaceous period.
The Prairie Bluff Chalk is a geologic formation in Alabama and Mississippi. It preserves fossils dating back to the Cretaceous period.
The Bangor Formation is a geologic formation in Alabama. It preserves fossils dating back to the Carboniferous period.
The Hartselle Sandstone is a geologic formation in Alabama. It preserves fossils dating back to the Carboniferous period.
The Parkwood Formation is a geologic formation in Alabama. It preserves fossils dating back to the Carboniferous period.
The Naheola Formation is a geologic formation in Alabama, United States. It preserves fossils.
Yazoo Clay is a clay geologic formation in Alabama, Louisiana, and Mississippi. It was named after a bluff along the Yazoo River at Yazoo City, Mississippi It contains is a type of clay known as montmorillonite, making it a poor foundation material due to the fact that moisture causes extreme changes in volume. Sand, pyrite, and marl have all been noted in the formation. It preserves fossils from the Eocene, including the prehistoric cetacean Basilosaurus.
The Byram Formation is a geologic formation in Alabama. It preserves fossils.
The Bangor Limestone is a fossil bearing Mississippian geologic formation in Alabama.
The Nanafalia Formation is a geologic formation in Alabama. It preserves fossils.
The St. Clair Limestone is a geologic formation in Arkansas, Indiana, Missouri, and Oklahoma. It preserves fossils dating back to the Silurian period. This high density, high magnesium dolomitic limestone was originally classified as a marble in Oklahoma due to the fact that it would hold a high polish, hence Marble City.
