Members of the Toroweap and Kaibab formations, Lower Permian, northern Arizona and southern Utah
- State Univ. of New York, Binghamton (United States)
- USGS, Flagstaff, AZ (United States)
The Toroweap Formation consists of, in ascending order, the Seligman, Brady Canyon, and Woods Ranch members. The Seligman Member, whose type section is near Seligman, Arizona, consists chiefly of pale-red and reddish- to yellowish-brown, fine-grained, calcareous sandstone and, in places, gypsum and dolomite. The Brady Canyon Member is composed of fossiliferous marine limestone, in part cherty. The Woods Ranch Member consists of dolomite, gypsum, and siltstone and, in part, fossiliferous limestone. All three members of the Toroweap change facies eastward from the western Grand Canyon area: the Seligman grades into fine-grained, crossbedded sandstone; the Brady Canyon into sandstone and dolomitic sandstone; and the Woods Ranch into dolomitic sandstone. Because of these facies changes, the members are unrecognizable east of a line running roughly north-south from west of Page, Arizona, to west of Flagstaff, Arizona. East of these areas, the term sandstone facies of the Toroweap Formation is used. The Kaibab Formation consists of the Fossil mountain Member below and the Harrisburg Member above. The Fossil Mountain Member consists of light-gray, thick-bedded, cherty and sandy limestone. It grades eastward into sandstone and calcareous sandstone. The Harrisburg Member consists of light-red to light-gray gypsum, limestone, and dolomite and lesser amounts of red and gray siltstone and sandstone. It merges with the calcareous sandstone facies of the Fossil Mountain east of a line running roughly north-south from near Page to east and south of Flagstaff. The term Kaibab Formation is here applied to the sandstone and calcareous sandstone facies of the Kaibab east of this line.
- OSTI ID:
- 5738889
- Journal Information:
- Mountain Geologist; (United States), Journal Name: Mountain Geologist; (United States) Vol. 28:1; ISSN MOGEA; ISSN 0027-254X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
580000* -- Geosciences
ARIZONA
CARBONATE MINERALS
CARBONATE ROCKS
CHERT
CLASSIFICATION
DEVELOPED COUNTRIES
DIMENSIONS
DOLOMITE
FEDERAL REGION IX
FEDERAL REGION VIII
GEOLOGIC FORMATIONS
GEOLOGIC STRATA
GEOLOGIC STRUCTURES
GEOLOGY
GYPSUM
LIMESTONE
MINERALS
NORTH AMERICA
ROCKS
SANDSTONES
SEDIMENTARY ROCKS
SILTSTONES
STRATIGRAPHY
SULFATE MINERALS
THICKNESS
USA
UTAH