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Found this in a recent deep wash along Muskegon river just showing in the sand. Thought I had a small shelf till I pulled it out. It has individual cell walls standing in many locations and multiple free and open cells. 7 full perforated passages naturally formed in various locations and directions throughout. Not one recent chip or broken edge visible. I about fell over, is this for sure Favocites Favosus? Anyone seem something like this? Thanks Jason
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