The Sonyea Group is a thin stratigraphic slice of the Devonian Catskill Delta Complex. We studied it because the internal stratigraphy was well understood, and prior studies had examined the interbedded sandstones and the paleoecology of infaunal and epifaunal brachiopods. In order to study how Paleozoic shale facies compares to that in the Proterozoic, this seemed a perfect framework for the study of lateral variability of shale facies along an onshore-offshore transect. The details of this study were published in JSR:
Schieber, J., 1999, Distribution and deposition of mudstone facies in the Upper Devonian Sonyea Group of New York. Journal of Sedimentary Research, v. 69, p. 909-925. download PDF file(left click on link and click on "Save as"...)












