Found in Farmyard-Need help identifying please

Homepage Forums What Is It? Found in Farmyard-Need help identifying please

This topic contains 6 replies, has 4 voices, and was last updated by  Timothy Carroll 1 month, 2 weeks ago.

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  • #40736

    Gail Tennant
    Participant

    Hi!  Found this in our farmyard (Eastern South Dakota) while out rockhounding.  A coral of some sort – maybe?

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    #40931

    Jayson Kowinsky
    Participant

    Hello,

     

    Ya, it looks like coral pieces in a limestone matrix.  All the little circles look like coral polyps.

    #40932

    Gail Tennant
    Participant

    Thank you for your input.  Do you or anyone happen to know if I should try to “clean” this up more — maybe try to remove some matrix?

     

    #55457

    James Preslicka
    Participant

    What part of South Dakota was this found in? It does look like a coral, probably a Paleozoic one to my eye.  Was this near the Black Hills area?

    #55481

    Gail Tennant
    Participant

    @JamesPreslicka

    This was found in central South Dakota in Sully County where I live on our farmland.  Sully Co lies almost center of the state on the east side of the Oahe Dam.  Our farm is located 6 miles north of Onida, SD on hwy 83 and due east another 7 miles.

     

     

    #55482

    James Preslicka
    Participant

    The bedrock in your area should be Cretaceous, but that coral bearing  rock sure looks Paleozoic to me.  It may perhaps be a glacial erratic – a piece of rock scraped up by an ice sheet during their advance, which is then left behind when the ice melts and retreats.

    #55578

    Timothy Carroll
    Participant

    This looks like one of the cheilostomate bryozoans.

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