1. Department of Geosciences; Princeton University; Guyot Hall, Princeton New Jersey 08544 USA
2. New Core Lab Division; Lamont-Doherty Earth Observatory of Columbia University; 206 New Core Lab, 61 Route 9W, P.O. Box 1000, Palisades New York 10964-8000 USA
3. Department of Marine Geology and Geophysics; Woods Hole Oceanographic Institution; Woods Hole Massachusetts 02543 USA
4. Marine Science Institute; University of Texas; Campus Mail Code T2500, Port Aransas Texas 78712 USA
5. Department of Geological Sciences; University of South Carolina; 700 Sumter Street, Columbia South Carolina 29208 USA