Kansas Crinoid Mass Mortality Assemblage
Niobrara Formation, Kansas
While dinosaurs roamed the North American landmass, this crinoid dwelled in the Western Interior Seaway which divided the continent in half. The Niobrara Formation, also known as the Niobrara Chalk, was deposited during the Late Cretaceous Age. Specimens of this species from Western Kansas are highly sought after by collectors. The present example exhibits a mass mortality assemblage, a presentation indicating that a large number of individuals died at the same time due to a natural cataclysm such as flooding or volcanic eruption. Offered in a frame in faux matrix.
Measures 14 ½ x 13 ¾ x 2in