Top--Exposures of the lower Devonian Rabbit Hill Limestone along the slopes at right; Eureka County, Nevada, a number of miles from the western border of White Pine County, Nevada. Fossiliferous Middle Ordovician Antelope Valley Limestone, geologically thrust over the younger Rabbit Hill Limestone in dramtic fashion, forms the hills on skyline in middle distance.

Bottom--A close view of folds and general geologic deformation in the lower Devonian Rabbit Hill Limestone in Eureka County, a number of miles from the western border of White Pine County, Nevada. Photograph courtesy Terry A. Grant; I edited and processed the image through photoshop. The Rabbit Hill is a prodigious producer of early Devonian Period invertebrate animal life, including--brachiopods, corals, crinoids, gastropods, trilobites, bryozoans, and conulariids (a poorly understood type that might be related to scyphozoan cnidarians).