SINGER, Brad S.1, SIEWERT, Sarah E.
1, MEYERS, Stephen R.
2, SAGEMAN, Bradley B.
3, CONDON, Daniel
4, JICHA, Brian R.
5, SAWYER, David A.
6, and OBRADOVICH, John D.
7, (1) Geoscience, University of Wisconsin-Madison, 1215 West Dayton St, Madison, WI 53076, bsinger@geology.wisc.edu, (2) Department of Geoscience, University of Wisconsin-Madison, 1215 West Dayton St, Madison, WI 53076, (3) Earth and Planetary Sciences, Northwestern University, 1850 Campus Drive, Evanston, IL 60208, (4) NERC Isotope Geoscience Laboratory, British Geological Survey, Keyworth, Nottingham, NG12 5GG, United Kingdom, (5) Geoscience, University of Wisconsin-Madison, Madison, WY 53706, (6) USGS, MS 980, Box 25046, Denver, CO 80225, (7) U.S. Geological Survey, MS 980, Box 25046, Denver, CO 80225