Arbuckle group depositional cycles, southern Oklahoma
- Chevron Inc., Hobbs, NM (USA)
- Chevron Inc., Denver, CO (USA)
Outcrop and/or subsurface core studies of Butterly Dolomite, Cool Creek, Kindblade, and West Spring Creek formations reveal most of the Arbuckle Group to have been deposited as a series of storm-dominated, shallowing-upward sequences. They were deposited upon an extremely broad, nearly flat carbonate ramp that formed the southern margin of the North American craton (Knox, Arbuckle, Ellenburger, and El Paso groups) in the Upper Cambrian and Lower Ordovician. Shallowing-upward sequences were deposited in a cyclic manner, with individual fifth-order cycles only a few feet to tens of feet thick. These cycles record abrupt transgressions, caused by quick sea level rise, followed by progradation of a paleoshoreline as sea level gradually fell. Each cycle is divided into subtidal and tidal-flat components. Subtidal and tidal-flat components can be of equal thickness or can be skewed with one component becoming dominant and the other subordinate. Only half of all cycles are complete shallowing-upward sequences. Once understood the vertical stacking of facies in a cycle is predictable so that complete vs. incomplete cycles can be easily recognized. These distinctions are very important to recognize because well-developed subtidal portions of a cycle can form reservoir intervals when dolomitized.
- OSTI ID:
- 6688699
- Report Number(s):
- CONF-900605-; CODEN: AABUD
- Journal Information:
- AAPG Bulletin (American Association of Petroleum Geologists); (USA), Vol. 74:5; Conference: Annual convention and exposition of the American Association of Petroleum Geologists, San Francisco, CA (USA), 3-6 Jun 1990; ISSN 0149-1423
- Country of Publication:
- United States
- Language:
- English
Similar Records
Regional facies distribution and cycle development of Upper Mississippian ramp carbonates, Appalachian Basin
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Related Subjects
58 GEOSCIENCES
DOLOMITE
DEPOSITION
OKLAHOMA
CAMBRIAN PERIOD
ORDOVICIAN PERIOD
PETROLEUM DEPOSITS
RESERVOIR ROCK
ALKALINE EARTH METAL COMPOUNDS
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CARBON COMPOUNDS
CARBONATE MINERALS
CARBONATES
FEDERAL REGION VI
GEOLOGIC AGES
GEOLOGIC DEPOSITS
MAGNESIUM CARBONATES
MAGNESIUM COMPOUNDS
MINERAL RESOURCES
MINERALS
NORTH AMERICA
OXYGEN COMPOUNDS
PALEOZOIC ERA
RESOURCES
USA
020200* - Petroleum- Reserves
Geology
& Exploration
580000 - Geosciences