Register of Collecting Localities
The. following pages list the localities from which samples were collecting in this study. They are listed by county, townships within counties, and sections within townships. Descriptions of the localities are rendered in conventional fashion. Because most of the localoities include marine units, that are relatively thin and uncomplicated, a pimple listing of the samples in stratigraphic order is presented in lieu of measured sections. Where possible these are keyed to citations in the literature or to specific file information of the Illinois State Geological Survey. Initials of persons responsible for these field nstes are given, and those known include: ETB = E. T. Benson, ACB = A. C. Bevan, DLC = D. L., Carroll, HEC = H. E. Culver, LC = L. Currier?, and HRW = H. R.Wanless.