Thursday, November 24, 2016

Ichthyocrinus subangularis Crinoid Calyx Fossil

These images are of what appears to be an Ichthyocrinus subangularis Hall crinoid calyx fossil. The fossil dates to the Middle Silurian Period. It was found in the Waldron Shale of Clark County Indiana USA.

Thanks to Alan for letting me image it.

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