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National Geologic Map Database
Geologic Unit: Strelna
Map showing publication footprint
  • Usage in publication:
    • Strelna Metamorphics
  • Modifications:
    • Named
    • Reference
  • Dominant lithology:
    • Marble
    • Schist
  • AAPG geologic province:
    • Alaska Southern region
Publication:

Plafker, George, Nokleberg, W.J., and Lull, J.S., 1989, Bedrock geology and tectonic evolution of the Wrangellia, Peninsular, and Chugach terranes along the Trans-Alaska Crustal Transect in the Chugach Mountains and southern Copper River basin, Alaska, IN Page, R.A., ed., Special section on northern Chugach Mountains-southern Copper River basin segment of the Alaskan Transect, Part 1: Journal of Geophysical Research, B, Solid Earth and Planets, v. 94, no. 4, p. 4255-4295.


Summary:

Strelna Metamorphics is defined as metamorphosed part of (now abandoned) Strelna Formation of Moffit [1938]. Exposed mainly in southern Wrangellia terrane margin between Chitina and Border Ranges faults east of Taral fault and in thin fault-bounded sheets between Taral fault and Richardson HWY. Reference section designated in headwaters of Canyon Creek (SW/4 sec.12 T6S R6E, Valdez B-1 quad); this locality yielded age-diagnostic fossils. Metamorphic assemblage includes greenschist, marble, schistose marble, quartzo-feldspathic-mica schist, and micaceous quartz schist. Is considered to be in part as old as Early Pennsylvanian by correlation along strike with strata containing age-diagnostic conodonts in marble about 10 km east of Copper River.

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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