Named Oak Grove sand for Oak Grove, on Yellow River, Okaloosa Co., FL. Unit appears to contain same fauna as Chipola marl and occurs in a fine, incoherent gray sand, with a number of species not found in the Chipola. Considered of Miocene age.
Source: GNU records (USGS DDS-6; Reston GNULEX).
Alum Bluff Group referred to as undifferentiated in this report. Because formations assigned by previous workers were differentiated on the basis of micro- and macrofossil faunas and implied age, not lithology, and do not satisfy the requirements of the Code, they are not used by this author. Alum Bluff is described in several outcrops and includes sediments previously differentiated as Chipola, Shoal River, Oak Grove, Whites Creek, Choctawhatchee, Red Bay, and Yellow River by others. The westernmost exposure of the undifferentiated Alum Bluff of this report was first described as the type locality of the Oak Grove sand member of the Alum Bluff formation (later Oak Grove Sand Member of the Shoal River Formation).
Source: GNU records (USGS DDS-6; Reston GNULEX).
For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.
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