1. Department of Geological Sciences; Northwestern University; 1850 Campus Drive, Locy Hall, Room 315,; Evanston; Illinois; 60208; USA
2. Department of Geology and Geophysics; Louisiana State University; E235 Howe Russell Geoscience Complex,; Baton Rouge; Louisiana; 70803; USA
3. Department of Geography; University of California; Ellison Hall 3611,; Santa Barbara; California; 93106; USA