National Geologic Map Database
Map showing publication footprint
  • Usage in publication:
    • Cash Creek Quartzite*
  • Modifications:
    • Named
  • Dominant lithology:
    • Quartzite
  • AAPG geologic province:
    • Idaho Mountains province

Hobbs, S.W., Hays, W.H., and Ross, R.J., Jr., 1968, The Kinnikinic Quartzite of central Idaho; redefinition and subdivision, IN Contributions to stratigraphy: U.S. Geological Survey Bulletin, 1254-J, p. J1-J22.


Named for exposures on Cash Creek, Custer Co, ID in Idaho Mountains province. Type section designated in steep cliffs about a quarter of a mile south of mouth of Cash Creek and on west side of Squaw Creek, Ts11 and 12N, R17E. Is a white or gray, orange, pink, purple, cross-laminated quartzite. Upper two-thirds is a pure quartzite or a pebbly quartzite; lower one-third has as much as 5 percent altered feldspar. Has a few thin layers of shale and silty quartzite. Estimated to be between 1,200 and 1,300 ft thick. Base covered by Challis Volcanics at type; base in fault contact with unnamed carbonate unit at west side, Squaw Creek above junction with Salmon River. Conformably overlain by unnamed siltstone and shale. Shales have a Middle Cambrian trilobite. Assigned an Early or Middle Cambrian age; is possibly equivalent to Flathead Quartzite. Was mapped previously by C. P. Ross as Kinnikinic Quartzite.

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

For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

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 ( ).

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