Stratigraphy and lithofacies of Foster formation in Michigan basin
- RPI International, Inc., Boulder, CO (USA)
The Lower Ordovician Foster formation lies in apparent conformity on the Umlor formation and is both conformably and unconformably overlain by the St. Peter Sandstone (Bruggers Formation), the primary target of the Michigan basin deep gas play. The Foster is stratigraphically equivalent to the Shakopee Dolomite and New Richmond Sandstone of the Illinois basin. The Foster formation is composed of up to 500 m of shallow marine and peritidal deposits divisible into three intervals. The basal interval is relatively uniform in thickness throughout the basin and is recognized by its interbedded lithologies above the relatively massive Unlor formation. The basal interval is primarily dolomite and sandstone with minor anhydrite. The middle interval is thickest in the basin center and progressively onlaps the basin margins. This interval is primarily dolomite and anhydrite. The upper unit extends throughout the basin but is thinner and truncated from above along the basin margins. Shaly dolomite and sandstone are the major lithologies.
- OSTI ID:
- 5661449
- Report Number(s):
- CONF-8909166-; CODEN: AABUD
- Journal Information:
- AAPG Bulletin (American Association of Petroleum Geologists); (USA), Vol. 73:8; Conference: American Association of Petroleum Geologists (AAPG) eastern section meeting, Blommington, IN (USA), 10-13 Sep 1989; ISSN 0149-1423
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
MICHIGAN
NATURAL GAS DEPOSITS
EXPLORATION
RESERVOIR ROCK
DOLOMITE
GEOLOGIC FORMATIONS
LITHOLOGY
ORDOVICIAN PERIOD
SANDSTONES
SEDIMENTARY BASINS
ALKALINE EARTH METAL COMPOUNDS
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CARBON COMPOUNDS
CARBONATE MINERALS
CARBONATES
FEDERAL REGION V
GEOLOGIC AGES
GEOLOGIC DEPOSITS
GEOLOGIC STRUCTURES
MAGNESIUM CARBONATES
MAGNESIUM COMPOUNDS
MINERAL RESOURCES
MINERALS
NORTH AMERICA
OXYGEN COMPOUNDS
PALEOZOIC ERA
RESOURCES
ROCKS
SEDIMENTARY ROCKS
USA
020200* - Petroleum- Reserves
Geology
& Exploration