Crinoids Posted September 10 Share Posted September 10 I have piece of rock from the Waldron shale that has a small bumpy black piece on it, was thinking maybe a piece/small fragment of a placoderm? Link to comment Share on other sites More sharing options...
Fossildude19 Posted September 10 Share Posted September 10 With the striations/grooves/lines I see present, I would lean more towards a bivalve shell, possibly with some sort of encrustation/debris of some sort on it. Cropped and contrasted: Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 IPFOTM -- MAY - 2024 _________________________________________________________________________________ "In every walk with nature one receives far more than he seeks." John Muir ~ ~ ~ ~ ><))))( *> About Me Link to comment Share on other sites More sharing options...
Rockwood Posted September 10 Share Posted September 10 The transvers ridge could represent a growth cycle in a poorly preserved horn coral. 1 Link to comment Share on other sites More sharing options...
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