Bibliographic Citation
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Title | Turonian (Eaglefordian) stratigraphy of the Atlantic Coastal Plain and Texas |
Creator/Author | Valentine, P.C. |
Publication Date | 1984 Jan 01 |
OSTI Identifier | OSTI ID: 5260255; TI85902206 |
Report Number(s) | USGS-PP-1315 |
Resource Type | Technical Report |
Research Org | Geological Survey, Denver, CO (USA) |
Subject | 580100 -- Geology & Hydrology-- (-1989); COASTAL REGIONS-- STRATIGRAPHY; AGE ESTIMATION;CRETACEOUS PERIOD;FEDERAL REGION I;FEDERAL REGION II;FEDERAL REGION III;FEDERAL REGION IV;FOSSILS;POLLEN |
Related Subject | GAMETES;GEOLOGIC AGES;GEOLOGY;GERM CELLS;MESOZOIC ERA;NORTH AMERICA;USA |
Description/Abstract | A stratigraphic analysis of 14 localities from New England to Georgia and of 1 well from the type area of the Eaglefordian Stage at Dallas, Texas, has resulted in a reevaluation of the ages of both formal and informal stratigraphic units previously established for the Atlantic and eastern Gulf Coastal Plains.^Lower Turonian strata, once thought to be absent beneath the Atlantic Coastal Plain, are present.^The study focused on a stratigraphic interval that is characterized by the presence of distinctive calcareous nannofossil and pollen floras.^The Complexiopollis-Atlantopollis pollen assemblage zone, widespread throughout the Atlantic and Gulf Coastal Plains and previously dated as late Cenomanian, is now shown to be late Cenomanian-early Turonian on the Gulf Coast on the basis of its occurrence with calcareous nannofossils, planktic foraminifers, and mollusks of that age.^On the Atlantic Coast, only the lower Turonian part of the Complexiopollis-Atlantopollis zone is known to be present.^Stratigraphic units that are now assigned to the lower Turonian include: (1) the Woodbridge Clay and Sayreville Sand Members of the Raritan Formation, New Jersey; (2) the upper part of the Raritan equivalent beneath the eastern shore of Virginia; (3) the Tuscaloosa equivalent (informal units K2, E, and part of F) in the South Carolina and Georgia coastal region; (4) the Tuscaloosa Formation of eastern Alabama and western Georgia; and, beneath the Gulf Coastal Plain; (5) the Coker Formation of western Alabama; and (6) the upper Britton and lowermost Arcadia Park Formations at Dallas, Texas.^Cenomanian strata beneath the Atlantic Coastal Plain are now interpreted to be much thinner than previously supposed.^The lower Turonian there is bounded by upper Turonian and uppermost Cenomanian hiatuses of regional extent, whereas the upper Cenomanian-Turonian section is relatively complete at Dallas, Texas.^75 refs., 10 figs., 1 tab. |
Country of Publication | United States |
Language | English |
Format | Pages: 24 |
Availability | US Geological Survey, 604 South Pickett St., Alexandria, VA 22304. |
System Entry Date | 2001 May 13 |
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