Download PDF by Karen J. Franczyk, Janet K. Pitman, William B. Cashion,: Evolution of Resource-Rich Foreland and Intennontane Basins

By Karen J. Franczyk, Janet K. Pitman, William B. Cashion, Thomas D. Fouch, John R. Dyni, Ronald C. Johnson, Marjorie A. Chan(auth.)

ISBN-10: 0875906249

ISBN-13: 9780875906249

ISBN-10: 1118667034

ISBN-13: 9781118667033

About The Product

Published through the yank Geophysical Union as a part of the Field journey Guidebooks Series.

higher Cretaceous and reduce Tertiary rocks in relevant and jap Utah list the transition from deposition in a marine foreland basin, bounded at the west by way of a thrust belt, and deposition in a domestically huge set of continental intermontane basins. comparable structural domain-linked rock sequences signify a lot of the jap Cordillera of the U.S. and Canada, however the timing of occasions and the neighborhood structural and depositional kind range from sector to zone. The formation of those foreland and intermontane complexes has given upward push to a remarkably varied and broad advanced of strength and mineral deposits whose occurrences quite often are depositionally controlled.
In Utah, Albian(?) to overdue Campanian tectonism characterised via thrust faults and coeval folds and synorogenic sedimentation in a marine foreland basin is part of, and coincident with, the Cretaceous Sevier orogeny of Armstrong (1968) (fig. 1). Rocks reflecting those sedimentologic and structural features are more often than not often called having resulted from "Sevier-style" tectonism and sedimentation. the advance of a big inner drainage method or a sequence of neighborhood basins bounded via faults of assorted kinds is used to point new or renewed uplift on structural components some distance to the east of the thrust belt, and stream within the thrust terrain, that segmented the foreland basin (fig. 2). The neighborhood uplift and intermontane process during this quarter is attribute of "Laramide-style" tectonism and sedimentation (Fouch and others, 1983) which, within the consultant sector, prolonged from past due Campanian/early Maastrichtian to past due Eocene/early Oligocene(?) time. The time period "Laramide" has been variably utilized for a few years for top Cretaceous to Eocene tectonism and synorogenic rocks of comparable beginning within the Rocky Mountains and is usually utilized in the region's literature.

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Additional info for Evolution of Resource-Rich Foreland and Intennontane Basins in Eastern Utah and Western Colorado: Salt Lake City, Utah to Grand Junction, Colorado, July 20-24, 1989

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1 In the bluffs across the White River at 9 o'clock are major coal beds and carbonaceous shales in the lower part of the Williams Fork Fonnation of the Mesaverde Group. The conspicuous bands of reddened rocks in the hillside are sandstones and shales baked by in situ burning of coal beds. 6 Deserado Coal Mine road to left across White River. Coal from this mine is transported by railroad to the Bonanza electric power plant in Utah. This plant was constructed in part to furnish power to the U-alU-b Oil-Shale Tract and to other oil-shale operations in Utah.

6 . . ~TU 31 I Mahogany oil-shale ledge 26 Tga Tgg Long Point Bed Base of R-1 Tgd Tgc Feet Meters 2000 500 1000 10 o 20 Kilometers 8 16 ,Miles Figure 20. East-west stratigraphic section across the north-central Piceance Creek basin showing facies variations and nomenclature within the Green River Formation. Note the significant decrease in oil-shale thickness and thinning of the Green River to the west in the vicinity of the Douglas Creek arch. Tw, Wasatch Formation; Tf, Fort Union Formation; Tg, Green River Formation; Tga, Anvil Points Member of Green River Formation; Tgc, Cow Ridge Member of Green River Formqtion; Tgd, Douglas Creek Member of Green River Formation; Tgg, Garden Gulch Member of Green River Formation; Tgp, Parachute Creek Member of Green River Formation; Tu, Uinta Formation.

5x107 mt) may be recoverable by conventional room-andpillar mining. A few kilometers south of this stop is Unocal's oil-shale property. Unocal, one of the major participants in oil-shale development in the Piceance Creek basin, began acquiring oil shale properties as early as 1918. The company produced more than 50,000 barrels (6,700 mt) on a pilot basis in the 1950's. During the 1980's, UnocaI has spent more than $650 million developing a commercial-size mine, retort, and upgrading plant. The mine, crushing equipment, and retort are in the East Fork of Parachute Creek about 5 Ian (3 mi) southeast of here.

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Evolution of Resource-Rich Foreland and Intennontane Basins in Eastern Utah and Western Colorado: Salt Lake City, Utah to Grand Junction, Colorado, July 20-24, 1989 by Karen J. Franczyk, Janet K. Pitman, William B. Cashion, Thomas D. Fouch, John R. Dyni, Ronald C. Johnson, Marjorie A. Chan(auth.)


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