Chepultepec Formation

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Chepultepec Formation
Stratigraphic range: Early Ordovician
TypeFormation
Unit ofKnox Group
Underlies
OverliesCopper Ridge Dolomite, Conococheague Formation
Location
RegionAlabama, Tennessee, and Virginia
Country United States
Type section
Named forChepultepec, Alabama
Named byUlrich, 1911

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 -- 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.[1] 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.[2] 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.[3][4]

See also[]

References[]

  1. ^ Read, J. Fred; Eriksson, Kenneth A. (2012). "Paleozoic Sedimentary Successions of the Virginia Valley & Ridge and Plateau" (PDF). Virginia Tech Scholarly Works, Department of Geosciences.
  2. ^ Unklesbay, A.G.; Young, Robert S. (May 1956). "Early Ordovician Nautiloids from Virginia". Journal of Paleontology. 30 (3): 481–491.
  3. ^ Spencer, Edgar W. (May 1964). "Natural Bridge and vicinity" (PDF). Virginia Minerals. 10 (2): 1–6.
  4. ^ Woodward, Edgar W. (1936). "Natural bridge and Natural Tunnel, Virginia". The Journal of Geology. 44 (5): 604–616.


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