jugglerguy Posted October 9, 2012 Share Posted October 9, 2012 These are some corals I found in Alpena, MI. I'm pretty sure the clump of four are horn corals? I've usually just found them as single things that look like Bugle chips. Do they typically form in clumps? I showed the other one to a fossil expert and he didn't think I had found it in Alpena. He wasn't sure what it was, other than it was a coral. There are two views of each. Link to comment Share on other sites More sharing options...
njfossilhunter Posted October 9, 2012 Share Posted October 9, 2012 Very nice find the first two pictures are of a Horn Coral and they can be found in large numbers stuck together.....and the other two are some kind of coral,,,,,which type I don't have a clue. TonyThe Brooks Are Like A Box Of Chocolates,,,, You Never Know What You'll Find. I Told You I Don't Have Alzheimer's.....I Have Sometimers. Some Times I Remember And Some Times I Forget.... I Mostly Forget. Link to comment Share on other sites More sharing options...
glacialerratic Posted October 9, 2012 Share Posted October 9, 2012 That cluster of rugose coral may be a colonial one; some nice examples of colonials come out of the Alpena area. I have one similar, a little smaller. Thinking it is a Eridophyllum sp. The best source for info on where you are hunting, is the Deep Blue Library at UM Ann Arbor. You can key word search, and there are a lot of papers. Here's a link using the key words Alpena, Devonian, Fossils: http://deepblue.lib.....x=0&submit.y=0 The ID on your rugose came from this paper, "Corals of the Devonian Traverse Group of Michigan. Part 1": http://deepblue.lib....246/2/ID085.pdf Link to comment Share on other sites More sharing options...
Tessy Posted October 13, 2012 Share Posted October 13, 2012 Could that third picture be a super worn/weathered Petoskey stone? Link to comment Share on other sites More sharing options...
evren Posted October 14, 2012 Share Posted October 14, 2012 (edited) I agree with the horn coral ID. I definitely see spicules in the third photo meaning that there is some sponge there, but I also see what looks like tabulae from a tabulate coral. Could be two things mashed together. Edited October 14, 2012 by evren Link to comment Share on other sites More sharing options...
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