Tectonic implications of the Dakota and lowermost Tropic formations, southwestern Utah
Conference
·
· Am. Assoc. Pet. Geol., Bull.; (United States)
OSTI ID:7042398
The middle Cretaceous (Albian-early Turonian) Dakota and lowermost Tropic formations in southwestern Utah form a wedge-shaped deposit of conglomerate, sandstone, mudstone, shale, and coal that thickens from a few meters in the Kaiparowits Plateau to more than 600 m in the Kolob terrace, a distance of 200 km. Four major facies assemblages are recognized: from the base upward, gravelly braided stream, coastal plain, mixed-energy shoreface, and offshore marine. The lowermost conglomerate unit was deposited by braided streams, that aggraded gravels within southeast-trending paleovalleys. A thin pebble lag occurs above and can be traced between conglomerate-filled valleys. The coastal-plain facies assemblage, characterized by fining-upward sandstone to coal sequences, was deposited by east-trending meandering streams with extensive interfluvial peat swamp and lacustrine environments. Five regionally correlatable (eustatic), transgressive-regressive marine sequences are recognized in the upper two facies assemblages, recording the initial incursion of the Cretaceous seaway. Temporally equivalent strata thicken from 8 m of offshore marine shale in the east to more than 200 m of stacked shoreline deposits in the west.
- Research Organization:
- RPI Colorado, Inc., Boulder
- OSTI ID:
- 7042398
- Report Number(s):
- CONF-8609129-
- Conference Information:
- Journal Name: Am. Assoc. Pet. Geol., Bull.; (United States) Journal Volume: 70:8
- Country of Publication:
- United States
- Language:
- English
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Conference
·
Mon Feb 28 23:00:00 EST 1983
· Am. Assoc. Pet. Geol., Bull.; (United States)
·
OSTI ID:6327189
Sedimentology of Upper Paleocene-Lower Eocene Sepultura Formation near Colonet, Baja California, Mexico
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·
Mon Feb 29 23:00:00 EST 1988
· AAPG Bull.; (United States)
·
OSTI ID:6633921
Sedimentology of basal Potsdam sandstone in Adirondack border region, New York, southeastern Ontario, and southwestern Quebec
Conference
·
Thu May 01 00:00:00 EDT 1986
· Am. Assoc. Pet. Geol., Bull.; (United States)
·
OSTI ID:5166077
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