suburbanamateur Posted March 8 Share Posted March 8 I was at Atwater Beach at Shorewood, WI for a couple of hours today because a cursory online search showed that it’s a place where people have supposedly found Silurian Reef fossils. I did not find anything of note except this rock that looks like a bunch of clams fell on wet concrete. I’m only second-guessing myself because the beach is littered with tiny mussel shells, as well, and I know it would not that that long under the right conditions for bivalve shells and sediment to become squished together into one mass. I have found some rocks that definitely looked like that. But, this one is much heavier and I only see what looks like indentations, not the shells themselves. Not to mention, the patterns on the ridges do not look like those of the native mussel shells that litter the beach. The second picture is the back of the thing. Link to comment Share on other sites More sharing options...
Ludwigia Posted March 8 Share Posted March 8 These structures appear to me to be brachiopod imprints. It also looks like the rock has other fossilized detritus within it. Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
fifbrindacier Posted March 8 Share Posted March 8 I agree, those are.impressions of brachiopods and pieces of shells. "On ne voit bien que par le coeur, l'essentiel est invisible pour les yeux." (Antoine de Saint-Exupéry) "We only well see with the heart, the essential is invisible for the eyes." In memory of Doren Link to comment Share on other sites More sharing options...
Rockwood Posted March 8 Share Posted March 8 There may be layers near the top of the exposure that are younger. This looks Silurian to me though. 1 Link to comment Share on other sites More sharing options...
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