Studies of cores and cuttings from 9 wells reveal a predominantly Haplophragmoides-Trochammina-Ammomarginulina assemblage. Spiroplectammina, Bigenerina, and Bathysiphon are less common. These forms are best represented in the more shaly and deeper water intervals of a marginal, shallow, marine section deposited under the influence of intermittently active deltaic conditions. Foraminifera, lithology, minerals, sedimentary structures, and electric-log character reflect persistently shallow and turbid water with low-oxygen and high-organic content resulting in a reducing paleoenvironment. The water chemistry inhibited CaCO₃ formation and the presence in quantity of calcareous Foraminifera. An abundant supply of clastic material and the lack of competition from cal areous types caused arenaceous Foraminifera to prevail in Wilcox microfossil populations.

End_of_Article - Last_Page 1782------------