Rosemary Posted April 8, 2019 Share Posted April 8, 2019 I was wondering about this pattern. Thx. Link to comment Share on other sites More sharing options...
Rockwood Posted April 9, 2019 Share Posted April 9, 2019 I think they may be transections of helispiral gastropods. (tall snails cut in two) Link to comment Share on other sites More sharing options...
Rosemary Posted April 9, 2019 Author Share Posted April 9, 2019 May I ask what characteristics point to that? Link to comment Share on other sites More sharing options...
Rockwood Posted April 9, 2019 Share Posted April 9, 2019 2 hours ago, Rosemary said: May I ask what characteristics point to that? This spiral around an axis is what I find to be the best indication. The best way to explain why I went with the ID on such scant evidence is that I can't really find a contraindication to it. I found a bunch of these in lower Devonian rocks last fall. Unfortunately the best examples are somewhere in my yard, hidden still under three feet of snow. Link to comment Share on other sites More sharing options...
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