RetiredLawyer Posted September 2, 2019 Share Posted September 2, 2019 Found these in east central Arizona, close to where I have found fossil footprints. The brown rock surrounding the white material looks like fine sand adhering to it. The white material is smooth. Link to comment Share on other sites More sharing options...
grandpa Posted September 3, 2019 Share Posted September 3, 2019 It looks geological to me, i.e., not a fossil. It's hard to be certain from the photos, but I'll go out on a narrow limb and say that it looks like a course, brown limestone folding and encompassing a fine-grained light limestone that was likely originally deposited as an over-layer. But wait for other responses to confirm or refute my guess. 1 Link to comment Share on other sites More sharing options...
fifbrindacier Posted September 3, 2019 Share Posted September 3, 2019 I agree with @grandpa "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...
RetiredLawyer Posted September 3, 2019 Author Share Posted September 3, 2019 I’ll probably try to scrape the brown layer off one of the pieces to expose more of the white part. Link to comment Share on other sites More sharing options...
DPS Ammonite Posted September 3, 2019 Share Posted September 3, 2019 No bones about it. I think that grandpa sees what I see. I see some soft sediment deformation. I rotated the top photo. I believe I see graded bedding in the lower coarse sandstone/ conglomerate layers: coarse on the bottom and finer on top. On top is a light colored clay/limestone. It looks like some disturbance (earthquake or overpressure?) caused the probably waterlogged lower layers to bulge upward into an area of lower pressure. In the process, the soft white layer was pushed up and broken. Later the whole rock hardened. 2 My goal is to leave no stone or fossil unturned. See my Arizona Paleontology Guide link The best single resource for Arizona paleontology anywhere. Link to comment Share on other sites More sharing options...
RetiredLawyer Posted September 3, 2019 Author Share Posted September 3, 2019 4 minutes ago, DPS Ammonite said: No bones about it. I think that grandpa sees what I see. I see some soft sediment deformation. I rotated the top photo. I believe I see graded bedding in the lower coarse sandstone/ conglomerate layers: coarse on the bottom and finer on top. On top is a light colored clay/limestone. It looks like some disturbance (earthquake or overpressure?) caused the probably waterlogged lower layers to bulge upward into an area of lower pressure. In the process, the soft white layer was pushed up and broken. Later the whole rock hardened. I’m I’ll probably try to scrape the brown layer off one of the pieces to expose more of the white part. Link to comment Share on other sites More sharing options...
RetiredLawyer Posted September 3, 2019 Author Share Posted September 3, 2019 I chipped off the white layer and it was not a solid piece. Just a curved layer in the sedimentary part. Thanks for all your help. Link to comment Share on other sites More sharing options...
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