Abstract
The Maestrichtian Lewis Shale of south-central Wyoming was deposited on the west side of the Sevier foreland basin. Well-log, core, and outcrop data document a vertical succession consisting of a condensed shelf shale overlain by bioturbated, probable turbidite sheet sandstone, deeper water sandy turbidites, and a progradational sandstone-shale interval of turbidite and deltaic deposits. Basin deepening and turbidite deposition were controlled by tectonic subsidence during the Sevier orogeny or early stages of the Laramide orogeny, and was possibly affected by eustatic sea-level rise.
The Lewis Shale-Fox Hills Sandstone interval can be subdivided into three zones based on seismic-reflection data: (1) A lower interval of parallel reflections correlates to a condensed shale section of the lower Lewis Shale. (2) A middle zone of parallel to sigmoidal clinoform reflections exhibiting shelf aggradation and progradation correlates with turbidite, slope, and deltaic sedimentation of the middle Lewis. (3) An upper unit of parallel reflections and tangential clinoforms represents mostly progradational deltaic, delta-front, and turbidite facies of the upper Lewis Shale and Fox Hills Sandstone.
Seismic facies observations allows mapping shelf edges and sandstone-rich submarine fans in the aggradational/progradational and progradational units. Large submarine fans in the middle Lewis Shale entered the basin from the north and west. Smaller, more numerous submarine fans of the upper Lewis Shale entered the basin from the north and south.
Broad folds, defined by thinning of the regional condensed shale and by seismic onlap, formed local subbasins during early Lewis time. In particular, a large northwest-southeast fold across the west-central Red Desert/Washakie Basin area affected shelf and submarine fan sedimentation.
The Lewis Shale condensed shelf shale and upper Almond Formation are interpreted as a transgressive systems tract, whereas the middle and upper Lewis Shale, Fox Hills Sandstone, and lower Lance Formation represent a highstand systems tract. The occurrence of abundant turbidite sandstone during a highstand can be attributed to tectonism and high sediment supply during Lewis Shale deposition.
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References Cited
Allmendinger, R.W., and Jordan, T.E., 1981: Mesozoic evolution, hinterland of the Sevier orogenic belt; Geology, v. 9, p. 308–313.
Asquith, D.O., 1970: Depositional topography and major marine environments, Late Cretaceous, Wyoming; Am. Assoc. Petrol. Geol. Bull., v. 54, p. 1184–1224.
Bouma, A.H., Normark, W.R., and Barnes, N.E., eds., 1985: Submarine fans and related turbidite systems; Springer-Verlag, Berlin, 351 p.
Cross, T.A., 1986: Tectonic controls of foreland basin subsidence and Laramide style deformation, Western United States, in P.A. Allen and P. Homewood, eds., Foreland basins; Int. Assoc. Sediment. Spec. Publ. 8, p. 15–39.
Fouch, T.O., Lawson, T.F., Nichols, D.T., Cashion, W.B., and Cobban, W.A., 1983: Patterns and timing of synorogenic sedimentation in Upper Cretaceous rocks of central and northern Utah, in M.W. Reynolds and E.D. Dolly, eds., Mesozoic paleogeography of west-central United States; Soc. Econ. Paleont. and Mineral. Paleogeogr. Symp. 2, p. 305–336.
Gill, J.R., and Cobban, W.A., 1973: Stratigraphy and geologic history of the Montana Group and equivalent rocks, Montana, Wyoming, and North and South Dakota; U.S. Geol. Surv. Prof. Paper 776, 37 p.
Gill, J.R., Merewether, E.A., and Cobban, W.A., 1970: Stratigraphy and nomenclature of some Upper Cretaceous and lower Tertiary rocks in south-central Wyoming; U.S. Geol. Survey Prof. Paper 667, 53 p.
Gries, R., 1983: North-south compression of Rocky Mountain foreland structures, in J.D. Lowell, ed., Rocky Mountain foreland basins and uplifts; Rocky Mtn. Assoc. Geol., p. 9–32.
Hansen, D.E., 1986: Laramide tectonics and deposition of the Ferris and Hanna Formations, south-central Wyoming, in J.A. Peterson, ed., Paleotectonics and sedimentation in the Rocky Mountain Region, United States; Am. Assoc. Petrol. Geol. Memoir 41, p. 481–495.
Haq, B.U., Hardenbol, J., and Vail, P.R., 1987a: Chronology of fluctuating sea levels since the Triassic; Science, v. 235 (4793), p. 1156–1167.
Haq, B.U., Hardenbol, J., and Vail, P.R., 1987b: The new chronostratigraphic basis of Cenozoic and Mesozoic sea level cycles, in C.A. Ross and D. Hamon, eds., Timing and depositional history of eustatic sequences: constraints on seismic stratigraphy; Cushman Foundation Spec. Publ. no 24, p. 7–13.
Heller, P.L., Angevine, C.L., Winslow, N.S., and Paola, C., 1988: Two-phase stratigraphie model of foreland-basin sequences; Geology, v. 16, p. 501504.
Jordan, T.E., 1981: Thrust loads and foreland basin evolution, Cretaceous, western United States; Am. Assoc. Petrol. Geol. Bull., v. 65, p. 25062520.
McÇiiookey, D.P., Haun, J.D., Hale, L.A., Goodell, H.G., McCubbin, D.G., Weimer, R.J., and Wulf, G.R., 1972: Cretaceous system, in Geologic Atlas of the Rocky Mountain Region; Rocky Mtn. Assoc. Geol., Denver, p. 190–228.
McMillen, K.J., and Winn, R.D., 1989: Seismic stratigraphy of Lewis Shale deltaic and deep-water elastics, Red Desert/Washakie Basins, Wyoming, in A.W. Bally, ed., Atlas of seismic stratigraphy, v. 3; Am. Assoc. Petrol. Geol. Studies Geol., no. 27, p 134–139.
McPeek, L.A., 1981: Eastern Green River Basin: A developing giant gas supply from deep, overpressured Upper Cretaceous sandstones; Am. Assoc. Petrol. Geol. Bull., v. 65, p. 1078–1098.
Merewether, E.A., and Cobban, W.A., 1981: Mid-Cretaceous formations in eastern South Dakota and adjoining areas–stratigraphie, paleontologic, and structural interpretations, in Cretaceous stratigraphy and sedimentation in Northwest Iowa; Iowa Geol. Surv. Guidebook, Series 4, p. 43–56.
Mitchum, R.M., 1977: Seismic stratigraphy and global changes in sea level, part 11: Glossary of terms used in seismic stratigraphy, in C.E. Payton, ed., Seismic stratigraphy-application to hydrocarbon exploration; Am. Assoc. Petrol. Geol. Memoir 26, p. 205–212.
Mitchum, R.M., Jr., 1985: Seismic stratigraphic expression of submarine fans, in O.R. Berg, and D.G. Woolverton, eds., Seismic stratigraphy II; Am. Assoc. Petrol. Geol. Memoir 39, p. 117–138.
Palmer, A.R., 1983: The decade of North American Geology 1983 geologic time scale; Geology, v. 11, p. 503–504.
Perman, R.C., 1987: Deltaic deposits of the Upper Cretaceous Dad Sandstone member of the Lewis Shale, South-Central Wyoming; The Mountain Geologist, v. 24 (1), p. 10–18.
Peterson, J.A., and Smith, D.L., 1986: Rocky Mountain paleogeography through geologic time, in J.A. Peterson, ed., Paleotectonics and sedimentation in the Rocky Mountain Region, United States; Am. Assoc. Petrol. Geol. Memoir 41, p. 3–19.
Steidtmann, J.R., Middleton, L.T., Bottjer, R.J., Jackson, K.E., McGee, L.C., Southwell, E.H., and Liebling, S., 1986: Geometry, distribution, and provenance of tectogenic conglomerates along the southern margin of the Wind River Range, Wyoming, in J.A. Peterson, ed., Paleotectonics and sedimentation in the Rocky Mountain Region, United States; Am. Assoc. Petrol. Geol. Memoir 41, p. 321–332.
Vail, P.R., 1987: Seismic stratigraphy interpretation procedure, in A.W. Bally, ed., Atlas of seismic stratigraphy, v. 1, Am. Assoc. Petrol. Geol. Studies Geol., no 27, p. 1–10.
Weimer, R.I. 1961: Uppermost Cretaceous rocks in central and southern Wyoming, and northwest Colorado; Wyoming Geol. Assoc. 17th Annual Field Conference-1961, p. 17–28.
Weimer, R.J., 1970: Rates of deltaic sedimentation and intrabasin deformation, Upper Cretaceous of Rocky Mountain region, in J.P. Morgan, ed., Deltaic sedimentation, modern and ancient; Soc. Econ. Paleont. Mineral. Spec. Publ. 15, p. 270–292.
Weimer, R.J., 1983: Relation of unconformities, tectonics, and sea level changes, Cretaceous of the Denver Basin and adjacent areas, in M.W. Reynolds and E.D. Dolly, eds., Mesozoic paleogeography of the West-Central United States; Rocky Mtn. Sec., Soc. Econ. Paleont. Mineral. Rocky Mtn Paleogeogr. Sym. 2, p. 359–376.
Winn, R.D., Jr., Bishop, M.G., and Gardner, P.S., 1985, Lewis Shale, south-central Wyoming: Shelf, delta-front, and turbidite sedimentation; Wyoming Geol. Assoc. 36th Ann. Field Conf., p. 113–130.
Winn, R.D., Jr., Bishop, M.G., and Gardner, P.S., 1987: Shallow-water and sub-storm-base deposition of Lewis Shale in Cretaceous Western Interior Seaway, south-central Wyoming; Am. Assoc. Petrol. Geol. Bull., v. 59, p. 859–881.
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McMillen, K.J., Winn, R.D. (1991). Seismic Facies of Shelf, Slope, and Submarine Fan Environments of the Lewis Shale, Upper Cretaceous, Wyoming. In: Weimer, P., Link, M.H. (eds) Seismic Facies and Sedimentary Processes of Submarine Fans and Turbidite Systems. Frontiers in Sedimentary Geology. Springer, New York, NY. https://doi.org/10.1007/978-1-4684-8276-8_14
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