Daniel Muhs
U.S. Geological Survey, Denver Federal Center, Denver, CO
Robert Diffendal
University of Nebraska-Lincoln
Robert Matthew Joeckel
University of Nebraska - Lincoln
Bradley Deline
University of West Georgia
Randa Harris
University of West Georgia
Karen Tefend
University of West Georgia
Nazrul Khandaker
CUNY York College
C. Schultz
University of Nebraska State Museum
Duane Eversoll
University of Nebraska-Lincoln
Larry Benson
U.S. Geological Survey