SPENCER, Sarah, Department of Geological Sciences, Indiana University, 1001 East 10th St, Bloomington, IN 47405, spencesc@umail.iu.edu and SCHIEBER, Juergen, Geological Sciences, Indiana University, 1001 East 10th Street, Bloomington, IN 47405

LOOPE, David B. and FIELDING, Christopher R., Earth & Atmospheric Sciences, University of Nebraska-Lincoln, 214 Bessey Hall, Lincoln, NE 68588-0340, dloope1@unl.edu

DAHLQUIST, Maxwell P., Department of Geology and Physics, University of Southern Indiana, 8600 University Boulevard, Evansville, IN 47712, mpdahlquist@gmail.com and ELLIOTT, William S. Jr, Geology & Physics, University of Southern Indiana, 8600 University Blvd, Evansville, IN 47712