WI-fossil-guy Posted August 22, 2019 Share Posted August 22, 2019 The fossil I am posting today does not contain calcium. I does contain agate and my question is could it be a fossil stromatoporoid or stromatolite or something else? Link to comment Share on other sites More sharing options...
grandpa Posted August 22, 2019 Share Posted August 22, 2019 I'm going with (c) "something else". From what I can make out in the picture, I believe the agate is flint and what we are looking at is a grouping of flint nodules in a L/S matrix. Link to comment Share on other sites More sharing options...
WI-fossil-guy Posted August 23, 2019 Author Share Posted August 23, 2019 Grandpa: Thanks for your feedback on my post. I think you may be on the right track.The nodules could be flint or agate or chert nodules, In the side of this rock (which was not in photos) there is fine botryoidal chalcedony which is apparently only related to fossils in that it fill in voids made by underlying fossils (as in some fossil coral). I was hoping the actual later of botryoidal chalcedony could be a pseudomorph of something like algae but that is seeming less likely all the time. Link to comment Share on other sites More sharing options...
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