Morrison Formation
Morrison Formation (AZ*,CO*,KS,MT*,NE,NM*,ND*,OK*,SD*,TX,UT*,WY*)
Outcrops of Morrision Formation along the Notom-Bullfrog Road in southern Capitol Reef National Park.
Dinosaur bones in the Morrison Formation on display at Dinosaur National Monument.
Jurassic, Late*
Oxfordian, late*
Kimmeridgian*
Tithonian*
Cretaceous, Early (local)
Neocomian (local)
Barremian (local)
Aptian (local)
Albian (local)
Anadarko basin*
Big Horn basin*
Black Mesa basin*
Central Montana uplift*
Chadron arch*
Denver basin*
Green River basin*
Las Vegas-Raton basin*
Montana folded belt province*
North Park basin*
Orogrande basin
Palo Duro basin*
Paradox basin*
Piceance basin*
Plateau sedimentary province*
Powder River basin*
San Juan basin*
San Luis basin*
Sierra Grande uplift*
Sweetgrass arch*
Uinta basin*
Wasatch uplift*
Williston basin*
AZ*
CO*
KS
MT*
NE
NM*
ND*
OK*
SD*
TX
UT*
WY*
Not designated. Named for exposures near town of Morrison, Jefferson Co., CO (Eldridge, 1896).
Type section/locality designated along north side of W. Alameda Parkway roadcut, 2 mi north of town of Morrison, in SE/4 sec. 23, T. 4 S., R. 40 W., Jefferson Co., CO (Waldschmidt and LeRoy, 1944).
(alphabetical): Casamero Member (NM), Bluff Sandstone Member (AZ*,CO,NM*,UT*), Brushy Basin Member (AZ*,CO*,NM*,UT*), Bullington Member (NM), Chavez Member (UT*), Fiftymile Member (UT*), Jackpile Sandstone Member (NM*), Prewitt Sandstone Member (NM), Recapture Member (AZ*,CO*,NM*,UT*), Salt Wash Member (AZ*,CO*,NM*,UT*), Stockett Bed (MT), Tidwell Member (AZ*,CO*,NM*,UT*), Unkpapa Sandstone Member (SD*), Westwater Canyon Member (AZ*,CO*,NM*,UT*).
Unit Name History:
Named (Eldridge, 1896). Revised (Darton, 1904). Age modified (Darton and
Paige, 1925). Revised (Burbank, 1930; Goldman and Spencer, 1941). Type
section/locality designated (Waldschmidt and LeRoy, 1944). Revised (Cobban,
1945; LeRoy, 1946; Imlay, 1947; Stokes and Phoenix, 1948; Eckel, 1949;
Harshbarger and others, 1951; Smith, 1954; McLaughlin, 1954; Freeman and
Hilpert, 1957). Mapped 1:24k, Jefferson Co, CO (Van Horn, 1957). Biostratigraphic
dating (Peck, 1957). Revised (Ekren and Houser, 1959; Moberly, 1960; Mirsky,
1962). Mapped 1:24k, Jefferson Co, CO (Scott, 1962). Mapped 1:24k, Douglas
Co, Jefferson Co, CO (Scott, 1963). Revised (Smith, 1967). Mapped 1:24k,
Jefferson Co, CO (Scott, 1972). Mapped 1:24k, Ouray Co, CO (Luedke, 1972).
Mapped 1:24k, Grand Co, CO (Taylor, 1975). Mapped 1:24k, Moffat Co, CO
(Rowley and Hansen, 1979). Revised (O'Sullivan, 1980, 1983, 1984; Szigeti
and Fox, 1981; Mudge and Rice, 1982; Owen and others, 1984). Age modified
locally (Kowallis and Heaton, 1984). Not used (Witkind and others, 1986).
Age modified; Isotopic dating (Kowallis and Heaton, 1987). Not used (Schwans,
1988; Weiss and Roche, 1988). Revised (Aubrey, 1988; Condon and Huffman,
1988; Peterson, 1988; Condon, 1989; Lucas, 1991). Isotopic dating (Kowallis
and others, 1991). Age modified locally (Aubrey, 1992). Revised (O'Sullivan,
1992; Peterson, 1994). Biostratigraphic dating; Isotopic dating (Litwin
and others, in press).
Publications providing an Overview and/or Areal limits: Lee, 1902; Smith,
1903; Darton, 1904, 1909; Gilluly and Reeside, Jr., 1928; Gregory and
Moore, 1931; Goldman and Spencer, 1941; Waldschmidt and LeRoy, 1944; Speiker,
1946; Imlay, 1952; Waage, 1955; Tank, 1956; Frederickson and others, 1956;
Harshbarger and others, 1957; Sohn, 1958; Waage, 1959; Baldwin and Muelberger,
1959; Sohn and Peck, 1963; Robinson and Barnett, 1963; Mapel and Chisholm,
1964; Robinson and others, 1964; Pipiringos and O'Sullivan, 1976; Szigeti
and Fox, 1981; Barnes, 1983; DeWitt and others, 1986; Hunt and Lucas,
1987; GNU staff remark, 1989a, 1989b; Robertson, 1990; Johnson and Johnson,
1991; Condon, 1992; Aubrey, 1992; Fox, 1993.
References
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Lee, W.T., 1902, The Morrison shales of southern Colorado and northern New Mexico: Journal of Geology, v. 10, p. 36-58.
Smith, W.S.T., 1903, Description of the Hartville quadrangle [Wyoming]: U.S. Geological Survey Geologic Atlas of the United States, Hartville folio, no. 91, 6 p.
Darton, N.H., 1904, Comparison of the stratigraphy of the Black Hills, Bighorn Mountains, and Rocky Mountain Front Range: Geological Society of America Bulletin, v. 15, p. 379-448.
Darton, N.H., 1909, Geology and water resources of the northern portion of the Black Hills and adjoining regions in South Dakota and Wyoming: U.S. Geological Survey Professional Paper, 65, 105 p.
Darton, N.H. and Paige, Sidney, 1925, Description of the central Black Hills [South Dakota], [includes contributions by J.D. Irving]: U.S. Geological Survey Geologic Atlas of the United States, Central Black Hills folio, no. 219, 34 p.
Gilluly, James and Reeside, J.B., Jr., 1928, Sedimentary rocks of the San Rafael Swell and some adjacent areas in eastern Utah, IN Shorter contributions to general geology, 1927: U.S. Geological Survey Professional Paper, 150-D, p. D61-D110.
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Taylor, R.B., 1975, Geologic map of the Bottle Pass quadrangle, Grand County, Colorado: U.S. Geological Survey Geologic Quadrangle Map, GQ-1224, 1 sheet, scale 1:24,000.
Pipiringos, G.N. and O'Sullivan, R.B., 1976, Stratigraphic sections of some Triassic and Jurassic rocks from Douglas, Wyoming, to Boulder, Colorado: U.S. Geological Survey Oil and Gas Investigations Chart, OC-69, 1 sheet.
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Robinson, John W., and McCabe, Peter J., 1998, Evolution of a braided river system; the Salt Wash Member of the Morrison Formation (Jurassic) in southern Utah: SEPM (Society for Sedimentary Geology) Special Publication, v. 59, p. 93-107.
Robinson, John W., and McCabe, Peter J., 1997, Sandstone-body and shale-body dimensions in a braided fluvial system; Salt Wash Sandstone Member (Morrison Formation), Garfield County, Utah: AAPG Bulletin, v. 81, no. 8, p. 1267-1291.
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