1.6" Holocystites Sp Crinoid In Matrix Fossil Silurian Age Osgood Shale Napoleon Indiana Cedrelospermum ammonites ultimately vanished during the

ammonites ultimately vanished during the Cretaceous-Paleogene extinction event

This hard outer shell offered protection from predators and environmental stress while also allowing their remains to be exceptionally well preserved as fossils

it is a relatively soft mineral

Phytosaurs ultimately disappeared during the end-Triassic extinction event

First Appearance: ~521 million years ago

1.6" Holocystites Sp Crinoid In Matrix Fossil Silurian Age Osgood Shale Napoleon Indiana Cedrelospermum ammonites ultimately vanished during theLocation: Osgood Shale, Napoleon, Indiana Weight: 2. 1 Ounces Dimensions: 2. 5 Inches Tall, 1. 2 Inches Wide, 0. 9 Inches Thick (Matrix) Crinoid Dimensions are: 1. 6 Inches Tall, 0. 8 Inches Wide The Item Pictured is the one you will receive. Holocystites Sp Silurian in age (420 million years old) Holocystites is an extinct genus of echinoderms belonging to the class Cystoidea and sub phylum Blastozoa. These organisms thrived during the Paleozoic Era,