Jdeutsch Posted January 17, 2012 Share Posted January 17, 2012 I found this fossil, which I assume is the top of a crinoid, along Lake Monroe, IN- outside Bloomington. I don't know much about the geology of that region, bit there were a fair number of small peices of crinoid stems on the shore, as well as some geodes. Wondering if someone has an ID on this specimen and information about that area. I'd like to go back. There seemed like a lot of potential for some fun finds. Link to comment Share on other sites More sharing options...
trilobiteruss Posted January 17, 2012 Share Posted January 17, 2012 It is a geodized crinoid crown. I have found a few myself. Usually hard to tell which crinoid. I have geodes from over that way that are crinoid heads, brachiopods, gastropods. They are cool. In the past I have found a place on eastern side that has whole, ungeodized crinoids so the potential is there. Good find and ID keep looking... Link to comment Share on other sites More sharing options...
fishguy Posted January 17, 2012 Share Posted January 17, 2012 Could it be a blastoid? Link to comment Share on other sites More sharing options...
Indy Posted January 17, 2012 Share Posted January 17, 2012 Could it be a blastoid? Here is a web page with good images of Geodized Fossils: Click Here Flash from the Past (Show Us Your Fossils)MAPS Fossil Show Link to comment Share on other sites More sharing options...
trilobiteruss Posted January 17, 2012 Share Posted January 17, 2012 Here is a web page with good images of Geodized Fossils: Click Here Good link Barry! Link to comment Share on other sites More sharing options...
Jdeutsch Posted January 18, 2012 Author Share Posted January 18, 2012 The web page on Geode fossils was really helpful. I'm saving it. After looking it over I went back to my "Indiana" box. I saved some geodes for their intrinsic beauty- but now they remind me of Rick Banner turning into the incredible hulk. I can't really guess what #1 is-. I didn't notice the features on #2 until after looking at the web page. I cleaned it up a bit and was surprised. I guess it is a deformed blastoid or crinoid. I didn't realise that the obvious corals (3) were part of the same process that made the globular fossils. Central Indiana is definitely on a list of "return to" places. Link to comment Share on other sites More sharing options...
Mr. Edonihce Posted January 18, 2012 Share Posted January 18, 2012 I'm so glad you posted this one, and that I noticed. I have one of these too. I've always thought it was a crinoid crown, but was absolutely convinced that I'd never be able to figure out what kind. Now, at least I have this info. My next step will be to contact the rock shop I got it at (back in May, 2001) and see if they have geodes from IN. Thanks again. Oh.....are there many, many places where geodized crinoids may come from (like, it's just a common geologic process, and we could find them anywhere, and that's it), or is it a phenomenon that seems to have a level of hyperactivity in certain areas? . ____________________ scale in avatar is millimeters ____________________ Come visit Sandi, the 'Fossil Journey Cruiser' ____________________ WIPS (the Western Interior Paleontological Society - http://www.westernpaleo.org) ____________________ "Being genetically cursed with an almost inhuman sense of curiosity and wonder, I'm hard-wired to investigate even the most unlikely, uninteresting (to others anyway) and irrelevant details; often asking hypothetical questions from many angles in an attempt to understand something more thoroughly." -- Mr. Edonihce Link to comment Share on other sites More sharing options...
Indy Posted January 18, 2012 Share Posted January 18, 2012 I'm sure that I'm not the only one who has seen these shapes in the field and didn't collect them. I'm now wondering how many were actually geodized fossils Flash from the Past (Show Us Your Fossils)MAPS Fossil Show Link to comment Share on other sites More sharing options...
AgrilusHunter Posted January 19, 2012 Share Posted January 19, 2012 I can't speak for other places but these, especially the stems, are pretty common in many places of southern Indiana. Like Jdeutsch said, Lake Monroe is a good place to find them but many areas around Bloomington or Bedford are equally good collecting spots. Happy hunting! "They ... savoured the strange warm glow of being much more ignorant than ordinary people, who were only ignorant of ordinary things." -- Terry Pratchett Link to comment Share on other sites More sharing options...
Indiana Posted January 19, 2012 Share Posted January 19, 2012 I'm so glad you posted this one, and that I noticed. I have one of these too. I've always thought it was a crinoid crown, but was absolutely convinced that I'd never be able to figure out what kind. Now, at least I have this info. My next step will be to contact the rock shop I got it at (back in May, 2001) and see if they have geodes from IN. Thanks again. Oh.....are there many, many places where geodized crinoids may come from (like, it's just a common geologic process, and we could find them anywhere, and that's it), or is it a phenomenon that seems to have a level of hyperactivity in certain areas? If that is possible, then the area of Southern Indiana in which I live is one of them. I drive by a couple of houses everyday that have walls covered in geodes instead of bricks. Link to comment Share on other sites More sharing options...
mikeymig Posted January 19, 2012 Share Posted January 19, 2012 The web page on Geode fossils was really helpful. I'm saving it. After looking it over I went back to my "Indiana" box. I saved some geodes for their intrinsic beauty- but now they remind me of Rick Banner turning into the incredible hulk. I can't really guess what #1 is-. I didn't notice the features on #2 until after looking at the web page. I cleaned it up a bit and was surprised. I guess it is a deformed blastoid or crinoid. I didn't realise that the obvious corals (3) were part of the same process that made the globular fossils. Central Indiana is definitely on a list of "return to" places. I love the botryoidal chalcedony geode (the first photo) and maybe it will flourese under UV light. Many times I've wondered how much there is to know. led zeppelin Link to comment Share on other sites More sharing options...
Herb Posted February 3, 2012 Share Posted February 3, 2012 There are tons of these things in the Ft.Payne formation around Lake Cumberland,KY. I've been told by a couple people that these crinoid calyxes had bacterial growth in them that caused internal production of gases during decompostition that caused the heads to swell greatly? I have found them as big as softballs. "Absence of evidence is not evidence of absence"_ Carl Sagen No trees were killed in this posting......however, many innocent electrons were diverted from where they originally intended to go. " I think, therefore I collect fossils." _ Me "When you have eliminated the impossible, whatever remains, however improbable, must be the truth."__S. Holmes "can't we all just get along?" Jack Nicholson from Mars Attacks Link to comment Share on other sites More sharing options...
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