| Top--Specimens at left and middle are crinoid stems; fossil at right is part of a crinoid arm, which branches out from the crown, where the actual echinoderm crinoid animal lived. All from the upper Mississippian Diamond Peak Formation, eastern Eureka County, Nevada, not far from the western boundary with White Pine County, Nevada. Bottom--Crinoid stems from the upper Mississippian Diamond Peak Formation, Elko County, Nevada, a number of miles north of the border with White Pine County. Photograph courtesy a person who goes by the cyber-name KOI; I processed and edited the image through photoshop. |