Articulate crinoid stem and calyx set in a marine-cemented grainstone
from the very near-back-reef
Tansill Fm. Presence of such intact fossils indicates at least local pockets of low energy and/or high
rates of marine cementation of sediment. Outcrop on north side of Dark Canyon, at
canyon mouth, Eddy Co., NM.
© Peter A. Scholle, 1999