USING HIGH-RESOLUTION EVENT STRATIGRAPHY (HIRES) TO REVISE THE CHRONOSTRATIGRAPHIC CORRELATION OF WENLOCK-PRIDOLI (SILURIAN) STRATA OF THE CENTRAL AND WESTERN APPALACHIAN FORELAND BASIN (OHIO, WEST VIRGINIA, VIRGINIA)
Here, we provide new data that create the first continuous biochemostratigraphic record of the Wenlock through Pridoli series from the Appalachian Basin. These data include precise demonstration of the position of the Ireviken and Mulde positive carbon isotope excursions and revised conodont biostratigraphy of the central Appalachian Basin. Specifically, these findings demonstrate that the Cosner Gap and McKenzie members of the Mifflintown Formation, and the Williamsport, Wills Creek, and Tonoloway formations all require significant chronostratigraphic recalibration with respect to global Silurian series and stage boundaries. Thus, for example the Consner Gap and lower McKenzie now fall within the early Sheinwoodian or Ireviken positive C-isotope excursion, whereas the Williamsport Ss-lower Wills Creek interval contains the mid-Homerian or Mulde Event. The exact position of the Lau Event at present, remains uncertain. Additionally, the data presented here greatly improve our ability to correlate Silurian strata between the central Appalachian Basin and the western margin of the basin preserved in Ohio.