SilurianSalamander Posted Wednesday at 05:30 PM Share Posted Wednesday at 05:30 PM Silicified sponge(?) fossil found in Wisconsin Paleozoic gravel. Likely Ordovician or Silurian, possibly Cambrian or Devonian. Thanks! Link to post Share on other sites
TqB Posted Wednesday at 05:50 PM Share Posted Wednesday at 05:50 PM I believe it's a stromatoporoid, showing pillars and laminae. 1 2 Link to post Share on other sites
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