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Map showing publication footprint
  • Usage in publication:
    • Casadepaga schist*
  • Modifications:
    • Original reference
  • Dominant lithology:
    • Schist
  • AAPG geologic province:
    • Seward Peninsula province
    • Alaska West-Central region
Publication:

Smith, P.S., 1910, Geology and mineral resources of the Solomon and Casadepaga quadrangles, Seward Peninsula, Alaska: U.S. Geological Survey Bulletin, 433, 234 p., (incl. geologic maps, scale 1:62,500)


Summary:

Pg. 70-75, geol. maps. Casadepaga schist. Metamorphic schists of igneous origin, seldom auriferous. Assigned to post-Ordovician(?). Determination of igneous origin rests more upon areal and structural relations than upon chemical composition. Included in Nome group. Covers 100 sq mi in Solomon and Casadepaga quadrangles, one belt along eastern part of quadrangles and another along western part of quadrangles, Seward Peninsula, central western Alaska. Intrudes Sowik limestone of Nome group.
[GNC remarks (US geologic names lexicon, USGS Bull. 896, p. 359; GNC index card files, 1909-1936): Age of Casadepaga schist considered early Paleozoic or pre-Paleozoic. Type [area]: Casadepaga quadrangle, which is named from Casadepaga Creek.]

Source: Publication; US geologic names lexicon (USGS Bull. 896, p. 359); GNU records (USGS DDS-6; Menlo GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Casadepaga Schist*
  • Modifications:
    • Age modified
  • AAPG geologic province:
    • Seward Peninsula province
    • Alaska West-Central region
Publication:

Yeend, Warren, Kaufman, D.S., and Till, A.B., 1988, Placer gold of the Solomon, Bendeleben, and southern part of the Kotzebue quadrangles, western Alaska: U.S. Geological Survey Miscellaneous Field Studies Map, MF-1838-C, 1 sheet, scale 1:250,000


Summary:

Unit age is Ordovician based on conodonts collected from overlying and underlying units.

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

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