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2534 Views 3 Replies Last post: Aug 19, 2010 9:08 AM by Luanne - former Museum ID team member RSS
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Apr 20, 2011 4:07 PM

Answered - Carboniferous coprolites? and plants

Found on a bedding plain near West Angle Bay where the carb limestones meet the devonian red sst.  I say group of fossils/traces as there seem to be what look like leaves, along with a bivalve and the curious trace fossil shaped like a string of beads...  I'm stumped!  Any contributions welcome.

 

Message was edited by: Luanne

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    Aug 17, 2010 9:20 PM (in response to RhysJHH)
    Re: Can anyone identify this group of fossils/traces?

    Hi there,

    This is really puzzling so I've asked some colleagues in the palaeontology department to see what they make of it. Do I gather that it is part of the bedding plane and not a hand specimen? Seeing it as a hand specimen would have been handy for this one!

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    Aug 19, 2010 9:08 AM (in response to RhysJHH)
    Re: Can anyone identify this group of fossils/traces?

    Hi,

     

    I've had some suggestions for the "string of beads" like trace. A palaeobotanist said "if it is algae then it would likely be a calcareous alga in the Dasycladales. Would need to be something with a robust calcareous skeleton"

     

    Others have suggested coprolite. I came across a description and picture of "coprolites of dibranchiate cephalopds, in the form of smooth circular ropes of one to four mm in diameter" today in Fossils of the World ed. Julian Brown. They look a bit like this but I'm just guessing really!

     

    We've had a bit more luck with the fragments in the pictures DSCN2969 and DSCN 2958. A palaeobotanist has confirmed they both look like plants.  DSCN2969 is most likely a fragment of Calamites stem or Cordaites leaf but can't be sure. DSCN 2958 looks like a fragment of root, narrow stem, or possibly even leaf but again can't be sure.

     

    I'll let you know if I get any more opinions!

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