Rockjunkie717 Posted August 17, 2019 Share Posted August 17, 2019 I found these rocks at Black River Harbor and Little Girl's Point in Michigan a few days ago. It's driving me crazy not knowing what they are! Any insights would be greatly appreciated! Link to comment Share on other sites More sharing options...
Rockjunkie717 Posted August 17, 2019 Author Share Posted August 17, 2019 Also found these two Link to comment Share on other sites More sharing options...
Rockwood Posted August 17, 2019 Share Posted August 17, 2019 Crinoid stem section. Crinoid stem columnal. Crinoid calyx mold. Link to comment Share on other sites More sharing options...
Peat Burns Posted August 17, 2019 Share Posted August 17, 2019 Pictures 1, 3, and 4 are coral. 2 Link to comment Share on other sites More sharing options...
Rockwood Posted August 17, 2019 Share Posted August 17, 2019 4 minutes ago, Peat Burns said: Pictures 1, 3, and 4 are coral. Agreed. ' shouldn't go with first impulse like that. Link to comment Share on other sites More sharing options...
Rockjunkie717 Posted August 17, 2019 Author Share Posted August 17, 2019 Any certain type of coral? And any idea what picture 2 is? Link to comment Share on other sites More sharing options...
Kane Posted August 17, 2019 Share Posted August 17, 2019 When corals are this water worn, it can be almost impossible to ID them to a species. They appear to be rugose corals. Photo number two is a crinoid columnal. 1 ...How to Philosophize with a Hammer Link to comment Share on other sites More sharing options...
FossilNerd Posted August 17, 2019 Share Posted August 17, 2019 (edited) Picture 2 is a crinoid columnal. Edit: Kane types faster than me. Edited August 17, 2019 by FossilNerd 1 The good thing about science is that it's true whether or not you believe in it. -Neil deGrasse Tyson Everyone you will ever meet knows something you don't. -Bill Nye (The Science Guy) Link to comment Share on other sites More sharing options...
Rockjunkie717 Posted August 17, 2019 Author Share Posted August 17, 2019 Thank you all so much! I'm beyond fascinated by all of this. I used to be an agate freak and now it's starting to shift lol. Link to comment Share on other sites More sharing options...
Rockwood Posted August 17, 2019 Share Posted August 17, 2019 I have a mold of a calyx with it's arms curled up in a way that looks much like the third photo. I really wanted that to be what it was. Link to comment Share on other sites More sharing options...
Peat Burns Posted August 17, 2019 Share Posted August 17, 2019 1 hour ago, Rockjunkie717 said: Thank you all so much! I'm beyond fascinated by all of this. I used to be an agate freak and now it's starting to shift lol. If you have experience polishing agates, those coral pieces will polish nicely. You can even polish them by hand. There are videos and instructions online for polishing "petoskey stones" (devonian colonial rugose corals) that will show you how and will work for your finds. Link to comment Share on other sites More sharing options...
Rockjunkie717 Posted August 17, 2019 Author Share Posted August 17, 2019 I absolutely want and will polish these. I've been doing alot of research to find hot spots for coral pieces around Michigan and Wisconsin. Any suggestions? Link to comment Share on other sites More sharing options...
grandpa Posted August 17, 2019 Share Posted August 17, 2019 2 hours ago, Rockjunkie717 said: I used to be an agate freak and now it's starting to shift lol. You can love both; I do!! Link to comment Share on other sites More sharing options...
Jdeutsch Posted August 17, 2019 Share Posted August 17, 2019 Favosites (Honeycomb coral) is fairly common on The Lake Michigan side of Door County Horn coral (Rugosa) and chain coral ( Halysites) is also rather common there there are some seams of coral in the area but most of the rock is fossil poor dolomite Link to comment Share on other sites More sharing options...
FossilNerd Posted August 17, 2019 Share Posted August 17, 2019 20 minutes ago, grandpa said: You can love both; I do!! Agreed! I almost always come home with one or two nice geological pieces when I go out collecting. The good thing about science is that it's true whether or not you believe in it. -Neil deGrasse Tyson Everyone you will ever meet knows something you don't. -Bill Nye (The Science Guy) Link to comment Share on other sites More sharing options...
Rockjunkie717 Posted August 18, 2019 Author Share Posted August 18, 2019 I spent about 4 hours hunting and came home with at least 10 pounds of agates. I also found a beautiful honeycomb coral. Is empire mine as great as it's described? Link to comment Share on other sites More sharing options...
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