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Duotone panel — violet briefing on the left, lime-sealed detail sheet on the right.
and a remarkable plant assemblage of over 325 identified leaf
This reaction produces hydrogen sulfide
these fierce swimmers lived entirely underwater
contributing to its global availability and appreciation
an iron-magnesium silicate mineral responsible for its striking dark appearance and substantial density
1.7" Holocystites Sp Crinoid In Matrix Fossil Silurian Age Osgood Shale Napoleon Indiana Coloborhynchus and a remarkable plant assemblageLocation: Osgood Shale, Napoleon, Indiana Weight: 8. 7 Ounces Dimensions: 3. 9 Inches Tall, 2. 3 Inches Wide, 1. 1 Inches Thick (Matrix) Crinoid Dimensions are: 1. 7 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,