Pg. 536, 539, 553. Lone Oak limestone lentil of Pisgah member of Kincaid formation of Midway group. Impure oolitic limestone containing a few fossils. Typically exposed at Lone Oak quarry west of Lone Oak, Hunt County, northeastern Texas. Occurs near base of Pisgah member (upper member of Kincaid formation), and can be traced some distance northeast and southwest of Lone Oak. Age is Eocene.
Source: US geologic names lexicon (USGS Bull. 896, p. 1211).
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