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National Geologic Map Database
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  • Usage in publication:
    • Kuskulana Pass Formation*
  • Modifications:
    • Named
  • Dominant lithology:
    • Sandstone
    • Siltstone
  • AAPG geologic province:
    • Alaska Southern region
Publication:

MacKevett, E.M., Jr., Smith, J.G., Jones, D.L., and Winkler, G.R., 1978, Geologic map of the McCarthy C-8 quadrangle, Alaska: U.S. Geological Survey Geologic Quadrangle Map, GQ-1418, scale 1:63,360


Summary:

Named for exposures near Kuskulana Pass. Type section designated as exposures extending south from NE 1/4 SE 1/4 SW 1/4 sec.32 T3S R10E to NE 1/4 SW 1/4 NW 1/4 sec.5 T4S R10E, upper drainage basin of Trail and Slatka Creeks near Kuskalana Pass, McCarthy C-8 quad, Wrangell Mountains, AK. Consists of dark-greenish gray or medium-gray (weathering brown) sandstone, siltstone and minor shale. Thickness is 300 m. Shallow marine deposits are thin-bedded, fine- and very fine-grained, and meagerly fossiliferous. Gradationally overlies Berg Creek Formation; disconformably, or with slight angular unconformity, underlies Kennicott Formation. Is Early Cretaceous (Hauterivian and Barremian) age.

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

Slash (/) indicates name does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).