Named Greensport Formation for Greensport Gap on the Coosa River, Etowah Co., AL. Consists of red, yellow, and tan, thin-bedded siltstone, calcilutite, and shale clasts. The Greensport overlies the Little Oak and Lenoir Limestones, and underlies the Colvin Mountain Sandstone. Unit is of Middle Ordovician age.
Source: GNU records (USGS DDS-6; Reston GNULEX).
The Greensport Formation of Drahovzal and Neathery (1971), of the Chickamauga Group in AL and the Chickamauga Supergroup in GA as redefined by Neathery (1986), in the Kingston and Clinchport thrust sheets, is here accepted by the USGS. Unconformably overlies the Lenoir Limestone in AL and the Knox Group in GA. Underlies the Colvin Mountain Sandstone of the Chickamauga Group or Supergroup.
Source: GNU records (USGS DDS-6; Reston GNULEX).
For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.
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