GEOLEX

Summary of Citation: Ashley

Publication:
Tuomey, Michael, 1848, Report on the geology of South Carolina:
   South Carolina Geological and Agricultural Survey [Report],
   no. 1, 293 p., Plates published separately with "Pleistocene
   fossils of South Carolina" by Michael Tuomey and F.S. Holmes,
   1857.

Usage in Publication:
Ashley marl/bed

Modifications:	Geologic Province:	Dominant Lithology:
Named	Atlantic Coast basin	Marl

Summary:
The marl of the Ashley and Cooper beds is characterized by its dark gray color and granular texture, while the remains of fishes and Mammalia give its fossil remains a peculiar character and leave no doubt of the position assigned to it, at the top of the Eocene series. These, together with the Santee beds amount to, at least, a thickness of 600 or 700 ft. The beds overlie Eocene Coralline marl and unconformably underlie Pliocene [Miocene] beds. Units are exposed along Ashley and Cooper Rivers, SC. [In text of above report, the beds along Ashley River are called Ashley marl and Ashley beds and the beds along the Cooper River are called Ashley and Cooper beds and Cooper River marls. It is also stated that many of the fossils of the Ashley are found on the Cooper.]

Summary of Citation: Ashley

Publication:
Wilmarth, M.G., 1938, Lexicon of geologic names of the United
   States (including Alaska): U.S. Geological Survey Bulletin,
   896, pts. 1-2, p. 1-2396

Usage in Publication:
Ashley

Modifications:	Geologic Province:	Dominant Lithology:
Abandoned	Atlantic Coast basin

Summary:
Unit known by the various names Ashley marl, Ashley River beds, Ashley River marl, Ashley-Cooper beds, Ashley-Cooper phase, Ashley-Cooper marl, Ashley and Cooper beds, and Ashley phosphate beds, is replaced by Cooper marl of Jacksonian age. The Ashley marl of Sloan (1908: South Carolina Geol. Survey, ser. 4, Bull. 2) which he defined as younger than Cooper marl, is interpreted by C.W. Cooke (1936: USGS Bull. 867) as including, in part, the Hawthorn formation (lower Miocene) and in part Cooper marl (upper Eocene).

Summary of Citation: Ashley

Publication:
Popenoe, Peter, Henry, V.J. and Idris, F.M., 1987, The Gulf
   Trough; the Atlantic connection: Geological Society of America,
   Geology, v. 15, p. 327-332

Usage in Publication:
Ashley Member*

Modifications:	Geologic Province:	Dominant Lithology:
Revised	Atlantic Coast basin	Marl

Summary:
In this discussion of the Clubhouse Crossroads Corehole # 1, Cooper Formation and its Harleyville, Parkers Ferry, and Ashley Members are used to conform to previous usage. Age of the Ashley Member is late Oligocene.

Summary of Citation: Ashley

Publication:
Harris, W.B. and Fullagar, P.D., 1991, Middle Eocene and late
   Oligocene isotopic dates of glauconitic mica form the Santee
   River area, South Carolina: Southeastern Geology, v. 32, no.
   1, p. 1-20

Usage in Publication:
Ashley Formation

Modifications:	Geologic Province:	Dominant Lithology:
Isotopic dating	Atlantic Coast basin

Summary:
Glauconitic micas from the Ashley Formation of the Cooper Group yield Rb-Sr isochron dates of 26.2+/-1.2 Ma. These dates are in agreement with the late Oligocene age assigned by previous authors.

Summary of Citation: Ashley

Publication:
Zullo, V.A., Katuna, M.P. and Herridge, K.C., 1992, Scalpellomorph
   and balanomorph barnacles (Cirripedia) from the upper Oligocene
   Ashley Formation, Charleston County, South Carolina: South
   Carolina Geology, v. 34, nos. 1-2, p. 57-67

Usage in Publication:
Ashley Formation

Modifications:	Geologic Province:	Dominant Lithology:
Areal limits Overview	Atlantic Coast basin

Summary:
Unit is generally restricted to the Summerville-Charleston area and has not been reported outside of Berkeley, Dorchester, and Charleston Cos., SC. The Ashley thickens toward the southeast and terminates to the northwest near the Dorchester Co. line. The top of the unit generally occurs 5 to 10 ft below the surface; the base extends to depths greater than 50 ft near Charleston Harbor. Throughout the area, the Ashley is unconformably overlain by Pliocene or Pleistocene deposits, or in places by the late Oligocene Chandler Bridge Formation. The barnacles of the Ashley Formation are correlatives of the faunas in the Belgrade and Silverdale Formations of NC and are assigned to the Chattian LOSPHOBALANUS BAUMI Zone. Correlation is supported by calcareous nannofossils found in the Ashley.