Stratigraphy, depositional environments; and sedimentary tectonics of the western margin, Cretaceous Western Interior Seaway

Depositional environments, palynology, and age of the Dakota Formation, south-central Utah
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Published:January 01, 1991
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CiteCitation
Barbara A. am Ende, 1991. "Depositional environments, palynology, and age of the Dakota Formation, south-central Utah", Stratigraphy, depositional environments; and sedimentary tectonics of the western margin, Cretaceous Western Interior Seaway, J. Dale Nations, Jeffrey G. Eaton
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The Dakota Formation of south-central Utah was deposited in the foreland basin to the east of the Sevier orogenic belt. During the early Late Cretaceous, clastics shed from the west accumulated in valleys cut into Jurassic rocks along the western margin of the Western Interior Seaway.
Braided stream deposits of horizontal and planar-tabular cross-bedded sand and gravel were the first sediments laid down on the erosional surface. Associated with a transgression of the seaway, anastomosed stream channel sands encased in fine-grained overbank sediments were the next to be deposited. Marine-influenced clastics overlie the fluvial sediments. Initially, these were lagoonal or...
- Ammonites
- Ammonoidea
- assemblages
- basins
- bedding plane irregularities
- biostratigraphy
- Cenomanian
- Cephalopoda
- clastic rocks
- conglomerate
- Cretaceous
- cross-bedding
- cross-stratification
- Dakota Formation
- deposition
- environment
- erosion
- fluvial environment
- foreland basins
- Invertebrata
- lithofacies
- lithostratigraphy
- marine environment
- Mesozoic
- microfossils
- Mollusca
- North America
- paleoecology
- palynomorphs
- planar bedding structures
- ripple marks
- sandstone
- sea-level changes
- sedimentary rocks
- sedimentary structures
- stratigraphy
- temperate environment
- Tetrabranchiata
- transgression
- Tropic Shale
- tropical environment
- United States
- Upper Cretaceous
- Utah
- Western Interior
- Western Interior Seaway
- south-central Utah