Coprolite Madagascar
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The Coprolite from Madagascar is sideritic, that is it is fossilizied by iron oxides, siderite, and limonite. The paleontology community is still debating sideritic coprolites. There are currently 3 schools of thought on this. 1. They are coprolites, fossil poop, in this case from unknown vertebrates. 2. They are cololites, fossilized casts of intestines. 3. They are just iron noduals. What do you think?