Early Silurian Brachiopods from the Subsurface of Southeastern Nebraska

Brachiopods ranging in age from upper Llandovery to lower Wenlock were obtained from core material in three wells, permitting correlation with outcrops in other areas. Thicknesses exceeding 500 feet are present with a three-fold lithologic subdivision. It is suggested that either lower and middle Llandovery deposition was restricted, or widespread erosion occurred prior to upper Llandovery time. The thickening of C6 and younger sediments may be related to the Silurian basin in Illinois.