kor Posted April 8, 2020 Share Posted April 8, 2020 Hello, I'm new to fossil hunting and I was hoping someone could help me identify these. I found both by Lake Erie. Thanks! Link to comment Share on other sites More sharing options...
TqB Posted April 8, 2020 Share Posted April 8, 2020 Welcome to the forum! They're tabulate corals, looks like Pleurodictyum sp. 2 Tarquin Link to comment Share on other sites More sharing options...
kor Posted April 8, 2020 Author Share Posted April 8, 2020 2 minutes ago, TqB said: Welcome to the forum! They're tabulate corals, looks like Pleurodictyum sp. Thank you! Link to comment Share on other sites More sharing options...
Fossildude19 Posted April 8, 2020 Share Posted April 8, 2020 Welcome to the Forum. What does the other side look like? Sometimes, you can see the imprint of the shell or gastropod they grew on. Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 __________________________________________________ "In every walk with nature one receives far more than he seeks." John Muir ~ ~ ~ ~ ><))))( *> About Me Link to comment Share on other sites More sharing options...
kor Posted April 8, 2020 Author Share Posted April 8, 2020 32 minutes ago, Fossildude19 said: Welcome to the Forum. What does the other side look like? Sometimes, you can see the imprint of the shell or gastropod they grew on. Thanks Tim. Here's the other side. 1 Link to comment Share on other sites More sharing options...
Fossildude19 Posted April 8, 2020 Share Posted April 8, 2020 Hmm. Interesting. These are obviously very water worn, so I cannot identify any substrate possibilities. Possibly a worm tube or bryozoan on the right specimen. Either way, those are cool Pleurodictyums. 4 Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 __________________________________________________ "In every walk with nature one receives far more than he seeks." John Muir ~ ~ ~ ~ ><))))( *> About Me Link to comment Share on other sites More sharing options...
TqB Posted April 8, 2020 Share Posted April 8, 2020 They very often have a worm in the middle, I'm sure that is one. Here's a decalcified one from Bolivia that bought (Devonian). (Also showing nice rod shaped negatives of the mural pores.) 3 Tarquin Link to comment Share on other sites More sharing options...
FranzBernhard Posted April 8, 2020 Share Posted April 8, 2020 Translating from my old paleontology book: "Pleurodictyum, disc-shaped to half-spheric, nearly round colonies, often enclosing a S-shaped "worm" (Hicetes). Colonies are often preserved as steinkerns." And just copying from wikipedia.de: "Pleurodictyum: Diese Gattung war vom Unteren bis zum Mitteldevon weltweit verbreitet. Das besondere Kennzeichen dieser Gattung ist der Hicetes, ein Wurm der die Kolonie durchbohrte. Eventuell handelt es sich um eine Synökie, da die Koralle offensichtlich nicht stark geschädigt wurde." Franz Bernhard 1 Link to comment Share on other sites More sharing options...
grandpa Posted April 8, 2020 Share Posted April 8, 2020 I believe these are not fossils at all but rather the mineral, Chlorastrolite, a.k.a. Michigan Greenstone, a much sought after mineral for jewelry and now hard to find. Link to comment Share on other sites More sharing options...
FranzBernhard Posted April 8, 2020 Share Posted April 8, 2020 Now that´s a bummer, @grandpa ! Thanks for the hint! Chlorastrolite (mindat page) There are many, many pics on the nett, and not all are green (name!), many are grey. But I still think the specimen in question is a fossil. But could be some of the grey Chlorastrolites Pleurodictyum instead? Franz Bernhard Link to comment Share on other sites More sharing options...
Fossildude19 Posted April 8, 2020 Share Posted April 8, 2020 Hmm. Interesting, but I'm sticking with Pleurodictyum, considering the "worm" shape at the bottom. Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 __________________________________________________ "In every walk with nature one receives far more than he seeks." John Muir ~ ~ ~ ~ ><))))( *> About Me Link to comment Share on other sites More sharing options...
piranha Posted April 8, 2020 Share Posted April 8, 2020 Chapter 2: Specialized, Potentially Interacting Biologic Substrates. pp. 15-42 In: Boucot, A.J. (ed.) 1990. Evolutionary Paleobiology of Behavior and Coevolution. Elsevier Science Publishers, 725 pp. 5 Link to comment Share on other sites More sharing options...
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