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Courtesy of UC Berkeley, Bancroft Library
http://www.oac.cdlib.org/ark:/28722/bk0007r8c8s/?order=1

Title:

Columnar rhyolite, Trinity Mountains
Trinity Mts : columnar rhyolite

Creator/Contributor:

O'Sullivan, Timothy H., 1840-1882, Photographer

Date:

[September 16, 1867]

Contributing Institution:

UC Berkeley, Bancroft Library