AJ Plai Posted February 7, 2013 Share Posted February 7, 2013 Just would like to know that are all pyrite sand dollars pseudo-fossils? Or there are actually sand dollar fossils that can become pyritized and they are confused with marcasite crystal or pyrite sun due to their similarity? If that's the case, how would you be able to tell the difference from the two? Link to comment Share on other sites More sharing options...
THobern Posted February 7, 2013 Share Posted February 7, 2013 I think that they are just pyrite suns, which should lack pentaradial symmetry. Link to comment Share on other sites More sharing options...
mikeymig Posted February 7, 2013 Share Posted February 7, 2013 I agree. They are mineral and not fossils. Some people market them as fossil sand dollars and I even saw one person try to say they were fossil jellyfish. Pyrite can form in a variety of shapes and the thin cracks that occur in this black shale cause the pyrite to grow or form into a disc. Mikey Many times I've wondered how much there is to know. led zeppelin Link to comment Share on other sites More sharing options...
Kosmoceras Posted February 7, 2013 Share Posted February 7, 2013 Here is an example of one I found, not an echinoid. Link to comment Share on other sites More sharing options...
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