HIGH-RESOLUTION INTEGRATED CONODONT AND CARBONATE CARBON ISOTOPE CHEMOSTRATIGRAPHY OF THE HANGENBERG EXCURSION FROM THE H-28 AND H-32 CORES BURLINGTON, IOWA
The historical type area for the Mississippian Subsystem in the tri-state area of Missouri, Iowa, and Illinois contains thick Devonian and Mississippian deposits, and Southeastern Iowa contains some of the most extensive Upper Devonian and Lower Carboniferous strata in the world. These expanded D/C boundary successions allow for high-resolution sampling for both biostratigraphy and chemostratigraphy. Here, we present high-resolution, integrated conodont and d13Ccarbdata from the H-28 and H-32 cores collected in southeastern Iowa. These data demonstrate the presence of the Hangenberg d13Ccarbexcursion with values reaching up to +6.0‰ across nearly 58 meters of strata and that the region contains one of the most expanded D/C boundary intervals in the world.