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<p>[QUOTE="Sallent, post: 3112669, member: 76194"]Your largest fossil seems similar to a genus of corals I've seen before, called Hexagonaria. They were a type of rugose coral (horned coral) that lived in colonies. In fact, that's probably what it is. You are looking at a type of colony of organisms that existed between 416 million years ago and 360 million years ago. They are found in great abundance in rock formations in Michigan, though I've seen some of these also come from similarly aged rock formations in North Africa.</p><p><br /></p><p>If you can measure the diameter of the individual organisms in the colony I could probably tell you what species of Hexagonaria it is.[/QUOTE]</p><p><br /></p>
[QUOTE="Sallent, post: 3112669, member: 76194"]Your largest fossil seems similar to a genus of corals I've seen before, called Hexagonaria. They were a type of rugose coral (horned coral) that lived in colonies. In fact, that's probably what it is. You are looking at a type of colony of organisms that existed between 416 million years ago and 360 million years ago. They are found in great abundance in rock formations in Michigan, though I've seen some of these also come from similarly aged rock formations in North Africa. If you can measure the diameter of the individual organisms in the colony I could probably tell you what species of Hexagonaria it is.[/QUOTE]
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