Carbonate tidal flat in mixed carbonate-siliciclastic clore formation (upper chesterian) in Southern Illinois
Conference
·
OSTI ID:6633603
The upper Chesterian Clore Formation consists primarily of delta-front sandstones of the Tygett Sandstone Member and interbedded offshore mud-rich carbonates and prodelta shales of the Cora and Ford Station Limestone Members. The basal Ford Station limestone in south-central Illinois contains a carbonate sequence 1.0 m thick marked by (1) laminated pelletal lime mudstones, (2) bird's-eye structures containing internal sediment, (3) vertical burrows, (4) horizontal shrinkage cracks, (5) autoclastic brecciation, (6) root. tubes, and (7) calciphers. These features indicate tidal-flat deposition. Other examples of peritidal carbonate deposition are unknown in the Chesterian of the Illinois basin. Tidal-flat strata overlie 1.9 m of interbedded shale and lime mudstones containing linguloid brachiopods, pectin bivalves, and ostracods. The lime mudstones and shales are interpreted as shallow-subtidal, restricted-shelf deposits overlying crevasse-splay deposits of the upper Tygett sandstone. Carbonate tidal-flat deposition in the upper Chesterian of the Illinois basin is an exception to the generally accepted model of nearshore terrigenous and offshore carbonate sedimentation. Delta switching is the most plausible explanation for development of the Clore tidal flat. Following deposition of the deltaic Tygett sandstone, peritidal carbonate deposition occurred in the basal Ford Station limestone when terrigenous sedimentation was deflected westward, as indicated by thin delta-front sandstones in the basal Ford Station limestone in southwestern Illinois. The tidal flat developed locally because south-central Illinois was the region of maximum progradation of the Tygett delta and because upper Tygett crevasse-splay deposits compacted less than adjacent shales.
- OSTI ID:
- 6633603
- Report Number(s):
- CONF-880301-
- Country of Publication:
- United States
- Language:
- English
Similar Records
Variability of deltaic sedimentation during clastic influx into a carbonate-dominated craton
Aux Vases-Renault-Yankeetown depositional sequence in comparison to other Chesterian depositonal sequences
Stratigraphy and depositional environment of upper Cambrian Red Lion Formation, southwestern Montana
Conference
·
Mon Dec 31 23:00:00 EST 1984
· Geol. Soc. Am., Abstr. Programs; (United States)
·
OSTI ID:6458481
Aux Vases-Renault-Yankeetown depositional sequence in comparison to other Chesterian depositonal sequences
Conference
·
Thu Sep 01 00:00:00 EDT 1983
· Am. Assoc. Pet. Geol., Bull.; (United States)
·
OSTI ID:6576916
Stratigraphy and depositional environment of upper Cambrian Red Lion Formation, southwestern Montana
Conference
·
Sat Aug 01 00:00:00 EDT 1987
· AAPG (Am. Assoc. Pet. Geol.) Bull.; (United States)
·
OSTI ID:5906476
Related Subjects
02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
03 NATURAL GAS
030200 -- Natural Gas-- Reserves
Geology
& Exploration
CARBONATE ROCKS
COASTAL REGIONS
EXPLORATION
FEDERAL REGION V
GEOLOGIC DEPOSITS
GEOLOGIC MODELS
GEOLOGY
GEOPHYSICS
ILLINOIS
LIMESTONE
MINERAL RESOURCES
NATURAL GAS DEPOSITS
NORTH AMERICA
OXYGEN COMPOUNDS
PETROLEUM DEPOSITS
PETROLEUM GEOLOGY
PETROLOGY
RESOURCES
RIVER DELTAS
ROCKS
SANDSTONES
SEDIMENTARY ROCKS
SHALES
SILICATES
SILICON COMPOUNDS
USA
020200* -- Petroleum-- Reserves
Geology
& Exploration
03 NATURAL GAS
030200 -- Natural Gas-- Reserves
Geology
& Exploration
CARBONATE ROCKS
COASTAL REGIONS
EXPLORATION
FEDERAL REGION V
GEOLOGIC DEPOSITS
GEOLOGIC MODELS
GEOLOGY
GEOPHYSICS
ILLINOIS
LIMESTONE
MINERAL RESOURCES
NATURAL GAS DEPOSITS
NORTH AMERICA
OXYGEN COMPOUNDS
PETROLEUM DEPOSITS
PETROLEUM GEOLOGY
PETROLOGY
RESOURCES
RIVER DELTAS
ROCKS
SANDSTONES
SEDIMENTARY ROCKS
SHALES
SILICATES
SILICON COMPOUNDS
USA