Crinoid Fossil. Arthroacantha carpenteri. Devonian. Silica Shale. Sylvania, Lucas County, Ohio, USA. 2.48 x 2.17 x 1.60 in...

Description

Crinoid Fossil
Arthroacantha carpenteri
Devonian
Silica Shale
Sylvania, Lucas County, Ohio, USA
2.48 x 2.17 x 1.60 inches (6.30 x 5.52 x 4.06 cm)

This silvery gray crown of a fossil Crinoid is quite impressive for its vascular arrangement of arms and protruding aboral cup. However, it is the nature of its preservation that makes this piece very special. The fossil is pyritized as the metallic mineral Pyrite replaced the organic matter during mineralization.

[Scale: 1 inch, with mark at 1 cm]

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