[12140] North American, Strata: Lower Eocene, Period: 42132, Rec 1757

[Rec № 1757] Alluvial architecture of a sheet sandstone, Willwood Formation, Big Horn Basin, Wyoming

Weislogel, A. L., Graham, S. A., Chang, E. Z., Wooden, J. L., Gehrels, G. E., & Yang, H.
Masters thesis, University of Colorado, 1988, « Missing Vol »