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Monday, November 21, 2011

Acrocyathus Mississippian Fossil Coral



These rugose coral fossils were found in Floyd County, Indiana in the St. Louis Limestone.  This limestone dates back to the Middle Mississippian (Carboniferous) period.  The corals appear to be Acrocyathus floriformis? also referred to as Lithostronchia or Lithostrotion or Lithostrotionella. These coral fossils also are found in Kentucky, Missouri, West Virginia, and maybe Alabama. Thanks to Alan for help with identification.

See a Lithostronchia specimen on the KYANA Geological Society web site: CLICK HERE

UPDATE (2019-06-15): website link below has changed to this: http://www.uky.edu/KGS/fossils/fossil-coral-rugose-corals-mound-shape.php

Learn more at the Kentucky Geological Survey web site: http://www.uky.edu/KGS/fossils/rugosecolonial3.htm

See other Lithostrotion corals on Plates XXXVI and XXXVII: CLICK HERE





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11 comments:

  1. UnknownMarch 22, 2018 at 1:21 PM

    I live in Hohenwald Tennessee and I have all kinds of this on my property, when I was growing up, I thought it was normal to have this everywhere

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  2. UnknownMay 21, 2018 at 12:43 PM

    I have just recently found one of these in Minnesota!! Can someone please tell me more about them?

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  3. UnknownMay 21, 2018 at 12:54 PM

    I have just found one of these on my farm in Minnesota! I am in a glacial deposit area and am starting to find cool things!

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  4. DidimlrMay 2, 2021 at 10:59 PM

    I have one found in Tennessee. Thanks for helping identify!

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  5. UnknownAugust 8, 2021 at 10:08 AM

    I found something similar but mine actually has creatures locked inside this mess that I found I need help determining what it is who do I go to

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  6. UnknownAugust 21, 2021 at 5:01 PM

    I found one in North Alabama.

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  7. UnknownDecember 30, 2021 at 6:58 AM

    I found one in chesaning mi, in the Misteguay creek in 1980. Its about 8 inches in diameter

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  8. AnonymousJune 28, 2023 at 6:28 PM

    I found a 40 + lb coral in TN It feels really solid, which I'm guessing is not a good thing? Should I attempt to cut into it?

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  9. AnonymousJune 28, 2023 at 6:31 PM

    I found a 40+ lb. Piece of reddish coral fossil in middle TN. It feels really solid , which I hard was not a good thing? Should I attempt to cut into it, with a masonry saw?

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  10. Michael PoppJune 28, 2023 at 11:46 PM

    Coral fossils can be quite large, solid and heavy. Whether to cut it is a personal choice. If you want to polish it and see the growth lines or the polygon shapes then cutting would be the way to go. If you want to use an ornamental fossil then probably not.

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  11. AnonymousOctober 24, 2023 at 8:30 AM

    I just found one in iowa close to Minnesota border

    ReplyDelete