Pg. 251. Luta limestone. More or less cellular, soft gray limestone, 10 to 30 feet thick, with siliceous and other geodes scattered through it and with layers of more or less banded chert concretions. Basal member of Marion stage. Overlain by Enterprise shales and underlain by Winfield limestone.
[See also 1909, Jour. Geol., v. 17, p. 710-729.]
Source: US geologic names lexicon (USGS Bull. 896, p. 1238-1239).
For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.
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