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Lithostratigraphy of the Jurassic San Rafael Group from Bluff to the Abajo Mountains, southeastern Utah: Stratigraphic relationships of the Bluff Sandstone

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Measured sections of Jurassic San Rafael Group strata correlated by lithostratigraphy along an ~60 km transect between Bluff and the Abajo Mountains in southeastern Utah indicate that: (1) the Carmel Formation is continuous and disconformable on the Navajo Sandstone (J-2 unconformity); (2) the Entrada Sandstone (Slick Rock Member) is continuous and conformable on the Carmel; (3) the Summerville Formation is continuous and does not intertongue with the Entrada (its base is the J-2 unconformity); (4) the Bluff Sandstone grades northward into the upper Summerville south of the Abajo Mountains; (5) the Recapture Member of the Bluff is physically continuous with at least part of the Tidwell Member of the Summerville; and (5) the base of the Salt Wash Member of the Morrison Fm. is a pervasive unconformity (J-5) with demonstrable local stratigraphic relief of up to 14 m. These observations counter previous claims of extensive Entrada-Summerville intertonguing in southeastern Utah and do not support recognition of depositional sequence boundaries in the Entrada and Summerville lithosomes. Though Entrada deposition may have been by a wet eolian system, its southeastern Utah outcrops are well to the south/ southeast of any marine and paralic facies with which the Entrada intertongues.
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55--68
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Bibliogr. 37 poz.
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  • New Mexico Museum of Natural History, 1801 Mountain Road NW, Albuquerque, NM 87104 USA
Bibliografia
  • 1.ANDERSON O.J., LUCAS S.G., 1992 — The Middle Jurassic Summerville Formation, northern New Mexico. New Mexico Geology, 14: 79–92.
  • 2.ANDERSON O.J., LUCAS S.G., 1994 — Middle Jurassic stratigraphy, sedimentation and paleogeography in the southern Colorado Plateau and southern High Plains. In: Mesozoic systems of the Rocky Mountain region (eds M.V. Caputo et al.): 299–314. Rocky Mountain Section SEPM, Denver.
  • 3.ANDERSON O.J., LUCAS S.G., 1995 — Base of the Morrison Formation, Jurassic, of northwestern New Mexico and adjacent areas. New Mexico Geology, 17: 44–53.
  • 4.ANDERSON O.J., LUCAS S.G., 1996a — Synopsis of the Entrada Sandstone. In: Guidebook for the Geological Excursion of the Continental Jurassic Symposium (Ed. M. Morales): 59–63. Museum of Northern Arizona, Flagstaff.
  • 5.ANDERSON O.J., LUCAS S.G., 1996b — Synopsis of the Bluff Sandstone. In: Guidebook for the Geological Excursion of the Continental Jurassic Symposium (Ed. M. Morales): 65–71. Museum of Northern Arizona, Flagstaff.
  • 6.ANDERSON O.J., LUCAS S.G., 1996c — Synopsis of the Summerville Formation. In: Guidebook for the Geological Excursion of the Continental Jurassic Symposium (Ed. M. Morales): 73–77. Museum of Northern Arizona, Flagstaff.
  • 7.ANDERSON O.J., LUCAS S.G., 1996d — Synopsis of the Morrison Formation. In: Guidebook for the Geological Excursion of the Continental Jurassic Symposium (Ed. M. Morales): 79–86. Museum of Northern Arizona, Flagstaff.
  • 8.ANDERSON O.J., LUCAS S.G., 1997 — The Upper Jurassic Morrison Formation in the Four Corners Region. New Mexico Geological Society Guidebook, 48: 139–155.
  • 9.BLAKEY R.C., PETERSON F., KOCUREK G., 1988 — Synthesis of late Paleozoic and Mesozoic eolian deposits of the Western Interior of the United States. Sedimentary Geology, 56: 3–125.
  • 10.CONDON S.M., PETERSON F., 1986 — Stratigraphy of Middle and Upper Jurassic rocks of the San Juan Basin – historical perspectives, current ideas, and remaining problems. AAPG Studies in Geology, 22: 7–26.
  • 11.CARR-CRABAUGH M., KOCUREK G., 1998 — Continental sequence stratigraphy of a wet eolian system: A key to relative sea-level change. In: Relative role of eustasy, climate, and tectonism in continental rocks (eds K.W., Shanley, P.J. McCabe): 213–228. SEPM Special Publication, 59.
  • 12.CRABAUGH M., KOCUREK G., 1993 — Entrada Sandstone: an example of a wet aeolian system. In: The dynamics and environmental context of aeolian sedimentary systems (Ed. K. Pye). Geological Society Special Publication, 72: 103–126.
  • 13.CRAIG L.C. et al., 1955 — Stratigraphy of the Morrison and relatedformations, Colorado Plateau region, a preliminary report. U. S. Geological Survey Bulletin, 1009-E: 125–168.
  • 14.GILLULY J., REESIDE J.B. Jr., 1928 — Sedimentary rocks of the San Rafael Swell and some adjacent areas in eastern Utah. U.S. Geological Survey Professional Paper, 150: 61–84.
  • 15.GOLDMAN M.I., SPENCER A.C., 1941 — Correlation of Cross’ La Plata Sandstone, southwestern Colorado. American Association of Petroleum Geologists Bulletin, 25: 1745–1767.
  • 16.GREGORY H.E., 1915 — Geology of the Navajo country, a reconnaissance of parts of Arizona, New Mexico and Utah. American Journal of Science, (4) 40: 102–112.
  • 17.GREGORY H.E., 1938 — The San Juan country, a geographic and geologic reconnaissance of southeastern Utah. U.S. Geological Survey Professonal Paper, 188: 1–123.
  • 18.HARSHBARGER J.W., REPENNING C.A., IRWIN J.H., 1957 — Stratigraphy of the uppermost Triassic and Jurassic rocks of the Navajo country. U.S. Geological Survey Professional Paper, 291: 1–74.
  • 19.JENSEN K., MORALES M., 1996 — Synopsis of the Navajo Sandstone. In: Guidebook for the Geological Excursion of the Continental Jurassic Symposium Museum of Northern Arizona, Flagstaff (Ed. M. Morales): 25–39.
  • 20.KOCUREK G., DOTT R.H., Jr., 1983 — Jurassic paleogeography and paleoclimate of the central and southern Rocky Mountain region. In: Mesozoic paleogeography of the West-central United States (eds M.W. Reynolds, E.D. Dolly): 101–118. Rocky Mountain Section SEPM, Denver.
  • 21.LUCAS S.G., ANDERSON O.J., 1997 — The Jurassic San Rafael Group, Four Corners region. New Mexico Geological Society Guidebook, 48: 115–132.
  • 22.LUCAS S.G., ANDERSON O.J., 1998 — Jurassic stratigraphy and correlation in New Mexico. New Mexico Geology, 20: 97–104.
  • 23.LUCAS S.G., HECKERT A.B., 2003 — Jurassic stratigraphy in west-central New Mexico. New Mexico Geological Society Guidebook, 54: 289–301.
  • 24.LUCAS S.G., HECKERT A.B., ANDERSON O.J., 2001 — The Middle Jurassic Entrada Sandstone near Gallup, New Mexico: Comment. The Mountain Geologist, 38: 225–227.
  • 25.LUCAS S.G., HUNT A.P., SPIELMANN J.A., 2005 — Jurassic stratigraphy in the Chama Basin, northern New Mexico. New Mexico Geological Society Guidebook, 56: 182–192.
  • 26.LUCAS S.G., HUNT A.P., DICKINSON W.R., 2006 — Stratigraphy and the base of the Jurassic Morrison Formation in Colorado National Monument, Mesa County, Colorado. New Mexico Museum of Natural History and Science Bulletin, 36: 9–15.
  • 27.O’SULLIVAN R.B., 1980 — Stratigraphic sections of Middle Jurassic San Rafael Group from Wilson Arch to Bluff in southeastern Utah: USGS Oil and Gas Investigations Chart OC-102.
  • 28.O’SULLIVAN R.B., 1996 — A comparison of the Middle Jurassic San Rafael Group at Church Rock and at Bluff in southeastern Utah. Utah Geological Association Guidebook, 25: 191–196.
  • 29.O’SULLIVAN R.B., 2003 — The Middle Jurassic Entrada Sandstone in northeastern Arizona and adjacent areas. New Mexico Geological Society Guidebook, 54: 303–308.
  • 30.PETERSON F., 1988 — Stratigraphy and nomenclature of Middle Jurassic rocks, western Colorado Plateau, Utah, and Arizona. U.S. Geological Survey Bulletin, 1633-B: 17–56.
  • 31.PIPIRINGOS G.N., O’SULLIVAN R.B., 1978 — Principal unconformities in Triassic and Jurassic rocks, Western Interior, U.S.: A preliminary survey. U.S. Geological Survey Professional Paper, 1035-A: 1–29.
  • 32.ROBERTSON J.F., O’SULLIVAN R.B., 2001 — The Middle Jurassic Entrada Sandstone near Gallup, New Mexico. The Mountain Geologist, 38: 53–69.
  • 33.ROSE E., 1996 — Synopsis of the Carmel Formation. In: Guidebook for the Geological Excursion of the Continental Jurassic Symposium (Ed. M. Morales): 49–58. Museum of Northern Arizona, Flagstaff.
  • 34.SEARS J.D., 1956 — Geology of Comb Ridge and vicinity north of San Juan River, San Juan County, Utah. U.S. Geological Survey Bulletin, 1021E: 167–207.
  • 35.SLOSS L.L., 1963 — Sequences in the cratonic interior of North America. Geological Society of America Bulletin, 74: 93–114.
  • 36.WEIR G.W., DODSON C.L., 1958 — Preliminary geologic map of the Mount Peale 3 SE quadrangle, San Juan County, Utah. USGS Map MF-147, scale 1:24,000.
  • 37.WRIGHT J.C., SHAWE D.R., LOHMAN S.W., 1962 — Definition of members of Jurassic Entrada Sandstone in east-central Utah and west-central Colorado. American Association of Petroleum Geologists Bulletin, 46: 2057–2070.
Typ dokumentu
Bibliografia
Identyfikator YADDA
bwmeta1.element.baztech-0ca6e752-488f-4662-b795-e1e1a5092eaa
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