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  • Usage in publication:
    • Perseverance slate*
  • Modifications:
    • Original reference
  • Dominant lithology:
    • Slate
  • AAPG geologic province:
    • Alaska Southeastern region
Publication:

Martin, G.C., 1926, Mesozoic stratigraphy of Alaska: U.S. Geological Survey Bulletin, 776, 493 p.


Summary:

Pg. 93-94. Perseverance slate. Unfossiliferous clay slate, possibly 3000 feet thick, underlying Gastineau volcanic group (new) and overlying Clark Peak schist (new). Age is Triassic or older.
[Named from Perseverance Camp, just east of Juneau, southeastern AK. Name adopted by the USGS Sept. 1922 for use in Spencer and Eakin's "Geology and ore deposits, Juneau, Alaska," in prep. (never published). Name adopted for this report May 1925.]

Source: US geologic names lexicon (USGS Bull. 896, p. 1641); GNU records (USGS DDS-6; Menlo GNULEX); GNC index card files (Reston).


Map showing publication footprint
  • Usage in publication:
    • Perseverance Slate*
  • Modifications:
    • Age modified
    • Biostratigraphic dating
  • AAPG geologic province:
    • Alaska Southeastern region
Publication:

Barton, C.C., and Light, T.D., 1987, Structural fabric analysis of the Perseverance Slate and gold-bearing quartz veins in the south ore body of the Alaska-Juneau lode system, southeastern Alaska, IN Hamilton, T.D., and Galloway, J.P., eds., Geologic studies in Alaska by the U.S. Geological Survey during 1986: U.S. Geological Survey Circular, 998, p. 110-112.


Summary:

Unit age is Late Triassic based on ammonites and Halobeid pelecypods from within unit; this is protolithic age. Metamorphic age is latest Cretaceous and early Tertiary (D.A. Brew, USGS, oral commun., 1986).

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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