Petrified Posted August 27, 2019 Share Posted August 27, 2019 I found this the other day. At first look it just looked like a normal rock. Then I found another one same detail, size, and all. Then this one was preserved with silica to make it even weirder. Any ideas as to what this is. It came from a rich Carboniferous period. The weird part is the 2 pieces didn't seem like they belonged with rest of shale fossils. Definition of a fossil= Love at first site. Link to comment Share on other sites More sharing options...
Petrified Posted August 27, 2019 Author Share Posted August 27, 2019 Definition of a fossil= Love at first site. Link to comment Share on other sites More sharing options...
grandpa Posted August 27, 2019 Share Posted August 27, 2019 These appear to be iron-stained clay concretions with calcite (or perhaps gypsum) crystals infilling the cracks, a.k.a. septarian nodules. 1 Link to comment Share on other sites More sharing options...
Mark Kmiecik Posted August 27, 2019 Share Posted August 27, 2019 +1 for concretion. Concretions are found very often in shale beds. Mazon Creek fossils are exactly that. There may be a fossil within the concretion that it formed around, but I see no evidence of any fossils on its surface. Of course, I'm not holding it in my hand, but from the photos I see nothing that may have been organic, nor any traces left by an organism. 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...
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