Brigantian age rocks in the Chainman Shale include the Camp Canyon Member. The fossil cephalopods shown below are from these rocks in the Confusion Range of Millard County.

References: Miller, A. K., Youngquist, W., and Nielson, M. L., 1952, Mississippian Cephalopods from Western Utah, Journal of Paleontology Vol. 26, no. 2; Kullman, J., Korn, D., and Petersen, M. S., 2000, GONIAT Database System, version 2.90, Tubingen. Titus, A. L., Korn, D., Harrell, J. E., & Lambert, L. L. (2015). Late viséan (late mississippian) ammonoids from the barnett shale, sierra diablo escarpment, Culberson county, Texas, USA. Fossil Record, 18(2), 81-104