Surface samples collected by the writer and fellow graduate students of Louisiana State University during geological investigations for the Louisiana Geological Survey in De Soto, Natchitoches, Red River, and Sabine parishes in 1939 and 1940 have yielded interesting microfaunas that suggest Midway relationships. Of more than one hundred samples collected for microscopic studies, only ten have yielded faunas of any size. These ten all lie within the outcrop area of Howe and Garrett’s Mansfield sub-group of the Sabine group and of Moody’s Wilcox group.
The ten localities have yielded a total of approximately seventy-five species of Foraminifera, ten species of...
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