Geology and energy resources of southwest Sego Canyon quadrangle, Grand County, Utah
The Southwest Sego Canyon 7 1/2-minute quadrangle is located in the Book Cliffs of eastern Utah and contain an exposed sequence of Upper Cretaceous through Eocene rocks. Exposed units include rocks from the upper Mancos Shale through the undifferentiated Wasatch Formation and were deposited during the final regressive phase of the Mancos sea. They represent shallow open-marine, wave-dominated deltas, and lower through upper flood-plain depositional environments. Coal has been produced from seams up to 8 ft (2.5 m) thick, but reserves are largely undeveloped. Hydrocarbons have been produced from adjacent areas, and similar structural and stratigraphic traps may exist in the quadrangle. The area is crossed by low-profile, north-northwest-trending folds. The Thompson anticline is a faulted, salt-movement produced fold. The Cisco dome is caused by minor Laramide adjustment on the Uncompahgre fault. The quadrangle overlies the Paradox basin margin and may have deeper Paleozoic related traps. Evidence of several structural events exists within the stratigraphic sequence. The Farrer Formation thins over the nose of the Cisco dome and documents Campanian movement on the Uncompahgre fault. Tuscher Formation current directions shift from east to northeast, indicating initiation of uplift on the San Rafael swell. Overlying conglomerate beds follow a 15-m.y. erosional hiatus and show sufficient uplift on the Uncompahgre fault to expose Mississippian rocks. Ratios of sandstone to shale in Wasatch Formation show derivation from the Uncompahgre uplift and a gradual reduction of the Uncompahgre highland.
- Research Organization:
- Utah Geological and Mineral Survey, Salt Lake, City
- OSTI ID:
- 5536273
- Report Number(s):
- CONF-8408161-
- Journal Information:
- Am. Assoc. Pet. Geol., Bull.; (United States), Vol. 68:7; Conference: Energy and More in '84, Salt Lake City, UT, USA, 27 Aug 1984
- Country of Publication:
- United States
- Language:
- English
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03 NATURAL GAS
01 COAL, LIGNITE, AND PEAT
COAL DEPOSITS
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PETROLEUM DEPOSITS
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ALLUVIAL DEPOSITS
CRETACEOUS PERIOD
DEPOSITION
GEOLOGIC FORMATIONS
GEOLOGIC TRAPS
SALT DEPOSITS
SANDSTONES
TERTIARY PERIOD
CENOZOIC ERA
FEDERAL REGION VIII
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NORTH AMERICA
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030200 - Natural Gas- Reserves
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011000 - Coal
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