This snail fossil is quite a find but so much more with encrusted worm tubes, bryozoans and pyrite cubic shapes. The snail appears to be a Platystoma niagarense with four visible Cornulites propius worm tubes and maybe a encrusting trepostome bryozoan. The end of the largest worm tube is a golden colored pyrite. The snail shell appears to be composed pyrite as well. It was found in the Waldron Shale of Shelby County Indiana USA. The fossils date to the Middle Silurian Period.
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