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2040 Views 12 Replies Last post: Jan 18, 2014 9:23 PM by Tabfish RSS
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Dec 20, 2012 3:17 PM

fossil found in rock

Found this in a quarry.  Looked as if it could have been some kind of vegetation?

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    Dec 22, 2012 2:30 PM (in response to chris)
    Re: fossil found in rock

    Yep, It looks like some sort of Equisetum (horsetail) stem.

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        Jan 18, 2013 9:30 PM (in response to chris)
        Re: fossil found in rock

        In a sense you're on the right track with Equisetum.

        It is a fossil of a very early plant, whose stems have similarities with modern Equisetum species.

        Have a Google for Calamites...

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          Jan 19, 2013 7:41 AM (in response to MikeHardman)
          Re: fossil found in rock

          Yes, both are in the Equisetales.  Without knowing the age of the deposit I was unwilling to pin it down to genus level.

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            Jan 19, 2013 8:32 AM (in response to quagga)
            Re: fossil found in rock

            That's fair enough, guagga - can't argue with your logic.

            Best we can really do is family - Calamitaceae - http://en.wikipedia.org/wiki/Calamitaceae.

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              Jan 19, 2013 8:49 AM (in response to MikeHardman)
              Re: fossil found in rock

              But then aren't you excluding the 'waste bin' taxon Equisetites ?  (I have some cretaceous examples of this genus collected from a local quarry)

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                Jan 19, 2013 9:46 AM (in response to quagga)
                Re: fossil found in rock

                You're right quagga; I was not firing on all cylinders.

                To include Equisetites, we should perhaps generalize to the class level - Equisetopsida (Sphenopsida), but we could probably come down to the Equisetales.

                 

                Chris: if you could tell us the location of the quarry (the more precise the better) (and how deep in the quarry), that might help us narrow down the age of the rock, and thereby allow us to be a little more specific on the identity of your fossil.

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                    Jan 19, 2013 12:57 PM (in response to chris)
                    Re: fossil found in rock

                    Good, thanks Chris.

                    Scout Moor Quarry spans the Lower Coal Measures (mudstone, siltstone, sandstone), Rough Rock (sandstone, known for some large tree fossils) and Upper Haslingden Flags (sandstone), 314-316million years ago - Upper Carboniferous.

                    So the Calamitaceae were still around (not extinct until Lower Permian). And so were the Equisitaceae.

                    Does this give you any clues, quagga?

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                    Jan 17, 2014 5:47 PM (in response to chris)
                    Re: fossil found in rock

                    It's deffinietly a Calamites fossil from the Carboniferous period in the group Horsetail.

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                    Jan 18, 2014 9:23 PM (in response to chris)
                    Re: fossil found in rock

                    Another nice find, well done.

                     

                    Tabfish

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