The biostratigraphic basis for Gulf Coast Miocene sequence stratigraphy
- Calibre Consulting Services, Inc., Houston, TX (United States)
A chronostratigraphic framework was developed as a prelude to a regional sequence stratigraphic and associated systems tracts analysis of the offshore Louisiana and Texas Miocene. The integrated data base for this study included over 10,000 line mi of seismic data, 230 wireline logs, and detailed biostratigraphic analyses on 35 wells. The objective of the study was to map systems tracts and facies that may help delineate prospective areas. Because they are a fundamental stratigraphic unit within a sequence, this framework emphasizes condensed sections and their calibration by microfossil highest occurrence datums. Condensed sections have been delineated utilizing planktonic foraminiferal and calcareous nannofossil abundance and species diversity patterns, as well as detailed paleo-water depth determinations based on benthic foraminiferal biofacies. Pitfalls in the use of condensed sections may arise in shallow paleoshelf settings where datums may be unreliable, and in deeper environments where multiple abundance/diversity peaks may occur. However, an event stratigraphic scheme is generally the most satisfactory method for overcoming correlation problems inherent in the Gulf Coast unstable prograding shelf margin.
- OSTI ID:
- 7259690
- Report Number(s):
- CONF-910403--
- Journal Information:
- AAPG Bulletin (American Association of Petroleum Geologists); (United States), Journal Name: AAPG Bulletin (American Association of Petroleum Geologists); (United States) Vol. 75:3; ISSN AABUD; ISSN 0149-1423
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
580000* -- Geosciences
AGE ESTIMATION
ANIMALS
AQUATIC ORGANISMS
CENOZOIC ERA
CONTINENTAL MARGIN
CONTINENTAL SHELF
DEVELOPED COUNTRIES
FEDERAL REGION VI
FORAMINIFERA
FOSSILS
GEOLOGIC AGES
GEOLOGY
GEOPHYSICAL SURVEYS
INVERTEBRATES
LOUISIANA
MICROORGANISMS
MIOCENE EPOCH
NORTH AMERICA
PALEONTOLOGY
PLANKTON
PROTOZOA
SARCODINA
SEDIMENTS
SEISMIC SURVEYS
STRATIGRAPHY
SURVEYS
TERTIARY PERIOD
TEXAS
US GULF COAST
USA