Salenia schencki Mortality Plate

Salenia schencki Mortality Plate
Keasey Formation, Isocrinus oregonensis Zone
Rupelian Age, Early Oligocene (34-27 Ma)
Mist, Columbia County, Oregon, USA
Acquired from online, August 2023

Most of the specimens are negatives, but a couple of tests are positives. This comes from a layer in the formation where Isocrinus oregonensis crinoids are common.