| Top and bottom--Two views of the middle to upper Mississippian Chainman Shale in western Millard County, Utah, not far from the eastern border of White Pine County, Nevada. In image at bottom, the lower Mississippian Joana Limestone (produces lots of corals, brachiopods, and crinoids) is seen in middle distance, just below the mountains on the skyline, directly above the ridge of Chainman Shale in middle ground. The Chainman Shale yields locally prodigious quantities of goniatites ammonoids, gastropods, and brachiopods in White Pine County, Nevada, and Millard County, Utah.Photographs courtesy S. Robert Bereskin, John D. McLennan, Thomas C. Chidsey Jr., and Peter J. Nielsen; I edited and processed the images through photoshop. |