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

Tectonic influence on sedimentation in the southern Sevier foreland, Iron Springs Formation (Upper Cretaceous), southwestern Utah
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Published:January 01, 1991
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CiteCitation
Robert P. Fillmore, 1991. "Tectonic influence on sedimentation in the southern Sevier foreland, Iron Springs Formation (Upper Cretaceous), southwestern 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 Upper Cretaceous Iron Springs Formation in southwest Utah consists of 1,000 m of fluvial sandstone, conglomerate, mudstone, and minor lacustrine carbonate rock. The formation was deposited in the proximal reaches of the southern sector of the Sevier foreland basin. These strata record uplift and erosion of thrust sheets in the fold/thrust belt to the west.
Facies associations indicate deposition in alluvial fan and fluvial braidplain environments. Laterally extensive sheets of clast-supported cobble conglomerate were deposited during episodes of unconfined sheetflood flow. Mud matrix-supported boulder conglomerate represents locally derived muddy debris flows. Lenticular bodies of sandstone and conglomerate were deposited...
- alluvial fans
- Aztec Sandstone
- carbonate rocks
- clastic rocks
- conglomerate
- controls
- Cretaceous
- debris flows
- drainage patterns
- erosion
- evolution
- faults
- fluvial environment
- fluvial features
- folds
- grain size
- Jurassic
- lacustrine environment
- lithofacies
- lithostratigraphy
- mass movements
- matrix
- Mesozoic
- mudstone
- paleocurrents
- sandstone
- sedimentary rocks
- sedimentation
- Sevier orogenic belt
- stratigraphy
- structural controls
- thickness
- thrust faults
- United States
- Upper Cretaceous
- Utah
- southwestern Utah
- Blue Mountain Thrust
- Iron Springs Formation
- Wah Wah Thrust
- Weiser Syncline
- Escalante Thrust