The Bragdon Formation is a geologic formation in California. It preserves fossils dating back to the Carboniferous period. Its sandstones may be rich in quartz, chert and sedimentary rock fragments, or volcanic rock fragments, or volcanic ash (tuff) containing abundant crystals.https://pubs.geoscienceworld.org/gsa/gsabulletin/article-abstract/103/2/268/182553/Continental-detrital-zircon-in-Carboniferous?redirectedFrom=fulltext M. M. Meghan Miller and Jason B. Saleeby. Continental detrital zircon in Carboniferous ensimatic arc rocks, Bragdon Formation, eastern Klamath terrane, northern California. GSA Bulletin (1991) 103 (2): 268-276 Gravelly, loamy brown soils of the Hugo series are commonly developed on Bragdon parent material in the Trinity Lake area.Lydon, P.A., and Klein, I.E., 1969, Geology of the southeast quarter of the Trinity Lake quadrangle, Trinity County, California:

See also

List of fossiliferous stratigraphic units in California Paleontology in California

References