Because a formal naming paper has not been published [and Bradley is a USGS co-author], used as West Branch Volcanics of Griscom (1976) in this report. Exposed on north bank of West Branch Penobscot River. Consists of prominent, cliff-forming outcrops of intermediate volcanic flows and sills, plus less resistant, slope-forming tuff and siltstone. Age is Silurian (Pridolian).
Source: GNU records (USGS DDS-6; Reston GNULEX).
For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.
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