Type area designated as shores of Nakwasina Passage and Nakwasina Sound (Baranof Island, southeastern AK), from which unit name is derived. Consists largely of metachert, volcanic rocks, and greenstone; marble, volcanic breccia, graywacke, argillite, phyllite, calcareous siltstone, schist, and hornfels occur locally. Group is probably many thousands of ft thick. Commonly separated from overlying rocks by faults; lower contact with schist and gneiss unit not observed. Considered to be Paleozoic(?) in age based on stratigraphic relations; no fossils found in unit.
Source: GNU records (USGS DDS-6; Menlo GNULEX).
[Overall] age is considered to be Permian(?) and Triassic(?) [based on regional correlation with Kelp Bay Group (part) and Katlian Group].
Source: GNU records (USGS DDS-6; Menlo GNULEX).
Unit is abandoned. Its strata are reassigned to Kelp Bay Group.
Source: GNU records (USGS DDS-6; Menlo GNULEX).
For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.
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