USGS Visual Identifier

National Geologic Map Database logo
GEOLEX database

Geologic Unit: Bashi

Publication:
Smith, E.A., and Johnson, L.C., 1887, Tertiary and Cretaceous 
   strata of the Tuscaloosa, Tombigbee, and Alabama Rivers: U.S. 
   Geological Survey Bulletin, 43, 189 p.
Usage in Publication:
Bashi series*, marl*

Modifications: Geologic Province: Dominant Lithology:
 Named
 Mid-Gulf Coast basin
 Marl
 Sand
 Clay
 Lignite

Summary:
Named Bashi series or marl for Bashi Creek, Clarke Co., AL. Consists of (descending) (1) 15 to 30 feet of Wood's Bluff or Bashi marl, (2) 25 feet of gray sandy clays containing toward base 4 or 5 thin lignite seams, (3) 35 to 40 feet of yellowish cross-bedded sands, and (4) 2 feet of lignite. The Bashi underlies the Hatchetigbee series and overlies the Bell's Landing series. It is of early Eocene age.
Source: GNU records (USGS DDS-6; Reston GNULEX).


Publication:
Gibson, T.G., and Bybell, L.M., 1981, Facies changes in the 
   Hatchetigbee Formation in Alabama-Georgia and the Wilcox-Claiborne 
   group unconformity: Gulf Coast Association of Geological 
   Societies Transactions, v. 31, p. 301-306.
Usage in Publication:
Bashi Marl Member*

Modifications: Geologic Province: Dominant Lithology:
 Biostratigraphic dating
 Mid-Gulf Coast basin
 South GA-North FL sedimentary province
 

Summary:
In eastern Alabama and western Georgia Gulf Coastal Plain, the Bashi Marl Member of the Hatchetigbee Formation and its "unnamed upper member" are time equivalents, and all facies of the Hatchetigbee were deposited during earliest early Eocene (lower half of calcareous nannofossil Zone NP10, radiometric age of 53.0-53.5 MA).
Source: GNU records (USGS DDS-6; Reston GNULEX).


Publication:
Gibson, T.G., 1982, New stratigraphic unit in the Wilcox Group 
   (upper Paleocene-lower Eocene) in Alabama and Georgia, IN 
   Stratigraphic notes, 1980-1982: U.S. Geological Survey 
   Bulletin, 1529-H, p. H23-H32.
Usage in Publication:
Bashi Formation*

Modifications: Geologic Province: Dominant Lithology:
 Revised
 Mid-Gulf Coast basin
 South GA-North FL sedimentary province
 

Summary:
The Bashi Formation, raised in rank, consists of lithologies previously called Bashi Marl Member of the Hatchetigbee Formation. Overlies the Tuscahoma Formation and conformably underlies Hatchetigbee or Tallahatta Formation.
Source: GNU records (USGS DDS-6; Reston GNULEX).


Publication:
Case, G.R., 1994, Fossil fish remains from the late Paleocene 
   Tuscahoma and early Eocene Bashi Formations of Meridian, 
   Lauderdale County, Mississippi: Palaeontographica, Abt. A, 
   Lfg. 4-6, Bd. 230, p. 97-138.
Usage in Publication:
Bashi Formation

Modifications: Geologic Province: Dominant Lithology:
 Biostratigraphic dating
 Mid-Gulf Coast basin
 

Summary:
The fish fauna of the Bashi Formation discovered at Meridian is early Eocene and represents an embayment or near-shore environment. The age of the Bashi may be equivalent to the Paniselian Stage of Europe, and lies above the Ypresian. Species types and sizes collected from the Bashi are very similar to those recovered in Flanders, Belgium. Report includes discussion of historical geology of the Bashi.
Source: GNU records (USGS DDS-6; Reston GNULEX).


Publication:
Gibson, T.G., and Bybell, L.M., 1995, Sedimentary patterns across 
   the Paleocene-Eocene boundary in the Atlantic and Gulf Coastal 
   Plains of the United States, IN Laga, P., ed., Paleocene-Eocene 
   boundary events; proceedings of the coordinators meeting: 
   Bulletin de la Societe Belge de Geologie, Brussels, Belgium, 
   December 2-6, 1991, v. 103, nos. 3-4, p. 237-265., International 
   Geological Correlation Programme (IGCP) Project No. 308, 
   Paleocene Eocene Boundary.
Usage in Publication:
Bashi Formation*

Modifications: Geologic Province: Dominant Lithology:
 Biostratigraphic dating
 Mid-Gulf Coast basin
 

Summary:
The Bashi and Hatchetigbee Formations of Eocene age intertongue throughout the Mid-Gulf Coast basin. Authors follow use of Bashi Formation of Gibson (1982) and compare biostratigraphic relationships with the Bashi Marl of Toulmin (1977). The Bashi Formation unconformably overlies the Tuscahoma Formation of Paleocene age and underlies the Hatchetigbee Formation. Therefore the Paleocene-Eocene boundary is within the hiatus between the Tuscahoma and Bashi Formations. The Bashi and Hatchetigbee Formations include calcareous nannofossil zones NP10 and NP11 and are of early Eocene age.
Source: GNU records (USGS DDS-6; Reston GNULEX).