Fossil, Crinoid Tumbled Stones
Crinoids are true animals even though they are often commonly called sea lilies. The Crinoid's body lies in a cup-shaped skeleton (calyx) made out of interlocking calcium carbonate plates. These nearly-extinct creatures used tubes on their arms to suck suspended food from the water around them.
Many Crinoids lived in and around the Oklahoma area and many fossils in the trade originated from that area.
The oldest crinoids are found in rocks of Cambrian age. They are common in the Paleozoic Era but not in younger time periods, perhaps because of the presence of more predators in marine communities. They are relatively rare in today’s oceans.
The tumbled stones in this listing contain various sized Crinoid Fossils recovered from Oklahoma.