Rockwood Posted June 29, 2019 Share Posted June 29, 2019 Had to bring this one home from the gravel pit just in case. Typical finds are Devonian marine, but volcanics are in the mix too. Any chance it's red algae ? Link to comment Share on other sites More sharing options...
Mark Kmiecik Posted June 29, 2019 Share Posted June 29, 2019 I'd have to say beige or grey. And on that note, I'll let someone who knows answer your question. 1 Mark. Fossil hunting is easy -- they don't run away when you shoot at them! Link to comment Share on other sites More sharing options...
Johannes Posted July 1, 2019 Share Posted July 1, 2019 An ideal candidate for a polished cut section. Did you test the light spheres for carbonates? (edit: those algae are calcareous and should response to the test) Could be anything, for example there are lapilli tuffites looking similar....(edit: Lapilli should not response to carbonate tests, except some very very geochem. strange ones) 1 Link to comment Share on other sites More sharing options...
supertramp Posted July 1, 2019 Share Posted July 1, 2019 any chance for a volcanic amygdaloidal rock? ciao https://www.google.com/search?biw=1517&bih=694&tbm=isch&sa=1&ei=CAMaXbWmNsytgQbS6qaABg&q=amigdaloidal+basalt&oq=amigdaloidal+basalt&gs_l=img.3..0i8i30l2.8892.11893..12976...0.0..0.250.1532.0j11j1......0....1..gws-wiz-img.......0i7i30j0i7i5i30j0i24.DeMgdrG3Kbo#imgrc=_ Link to comment Share on other sites More sharing options...
Rockwood Posted July 1, 2019 Author Share Posted July 1, 2019 It is non reactive to 35% HCl and roughly in the glacial field of a mountain of ryolite (Kineo), so I think some type of volcanic is a reasonable assumption. Thanks to all. Link to comment Share on other sites More sharing options...
Rockwood Posted July 1, 2019 Author Share Posted July 1, 2019 1 hour ago, supertramp said: any chance for a volcanic amygdaloidal rock? ciao https://www.google.com/search?biw=1517&bih=694&tbm=isch&sa=1&ei=CAMaXbWmNsytgQbS6qaABg&q=amigdaloidal+basalt&oq=amigdaloidal+basalt&gs_l=img.3..0i8i30l2.8892.11893..12976...0.0..0.250.1532.0j11j1......0....1..gws-wiz-img.......0i7i30j0i7i5i30j0i24.DeMgdrG3Kbo#imgrc=_ I think there are sedimentary features in it which I would guess point to a tuff. Link to comment Share on other sites More sharing options...
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