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Map showing publication footprint
  • Usage in publication:
    • Shedroof conglomerate*
  • Modifications:
    • Named
  • Dominant lithology:
    • Conglomerate
  • AAPG geologic province:
    • Northern Rocky Mountain region
Publication:

Park, C.F., Jr., and Cannon, R.S., Jr., 1943, Geology and ore deposits of the Metaline quadrangle, Washington: U.S. Geological Survey Professional Paper, 202, 81 p., (incl. geologic map, scale 1:96,000)


Summary:

Named from excellent exposures on Shedroof Mountain, Pend Oreille Co, WA. No type locality designated. Occurs within the northeast corner of the Metaline quadrangle and then crops out south-southwestward for nearly 8 miles, Pend Oreille Co, WA, and in adjoining Boundary Co, ID, Northern Rocky Mountain region. Forms high rugged peaks in area north of Thunder Mountain. Consists of a conglomerate of coarse, very poorly sorted rock with a dingy, rotted, gray-brown aspect. Fragments 1 to 8 inches in diameter comprise quartzite, dolomite, phyllite, schist, rarely granitic rocks, and small round quartzite cobbles and pebbles mixed with large angular limestone fragments. Lacks bedding. Matrix is dominantly sericite and fine-grained quartz with variable amounts of carbonate; chlorite and biotite are minor constituents. Pebbles in Shedroof probably derived from underlying Priest River group. May have been a fanglomerate deposit. Correlated with Irene conglomerate of Daly (1912). Thickness ranges from 3,000 to 11,000 ft. Unconformably overlies Priest River group?; underlies Leola volcanics (new). Geologic map. Correlation chart. Of late pre-Cambrian age.

Source: GNU records (USGS DDS-6; Denver GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Shedroof Conglomerate*
  • Modifications:
    • Revised
    • Age modified
  • AAPG geologic province:
    • Okanogan province
Publication:

Miller, F.K., McKee, E.H., and Yates, R.G., 1973, Age and correlation of the Windermere Group in northeastern Washington: Geological Society of America Bulletin, v. 84, no. 11, p. 3723-3730.


Summary:

Shedroof Conglomerate is included in the Windermere Group. Age is Precambrian Y.

Source: GNU records (USGS DDS-6; Menlo GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Shedroof Conglomerate*
  • Modifications:
    • Age modified
  • AAPG geologic province:
    • Okanogan province
    • Idaho Mountains province
Publication:

Stewart, J.H., 1991, Latest Proterozoic and Cambrian rocks of the western United States; An overview, IN Cooper, J.D., and Stevens, C.H., eds., Paleozoic paleogeography of the western United States; Pacific Coast paleogeography symposium II: Society of Economic Paleontologists and Mineralogists, Pacific Section, Field Trip Guidebook, Bakersfield, CA, March 4-8, 1991, book 67, p. 13-38.


Summary:

Age of the Shedroof Conglomerate is Late Proterozoic.

Source: GNU records (USGS DDS-6; Menlo GNULEX).


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Asterisk (*) indicates published by U.S. Geological Survey authors.

"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).

Slash (/) indicates name conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).

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