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837 Views 12 Replies Last post: Jan 17, 2014 8:21 PM by Tabfish RSS
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Apr 30, 2013 8:56 PM

fossilised seed?

Would this be some kind of seed .thanks in advance

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    May 1, 2013 6:13 AM (in response to chris)
    Re: fossilised seed?

    Chris,

     

    We need some more info:

    - location (country, county, town or locality or grid reference)?

    - in situ or loose (if loose, near an outcrop of similar rock)?

    - what do you know about fossils at the locality (you may have collected and IDd other specimens)?

     

    Mike

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    Jan 13, 2014 7:16 AM (in response to chris)
    Re: fossilised seed?

    Looks like a trigonocarpus nut from the carboniferous period.

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    Jan 13, 2014 9:30 PM (in response to chris)
    Re: fossilised seed?

    Seen similar matrix from the IoW Greensand.

    Nice find.

     

    Tabfish

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    Jan 13, 2014 9:33 PM (in response to chris)
    Re: fossilised seed?

    I've had a second look and it's deffinietly a trigononocarpus nut.  I can see the three ridges.

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    Jan 14, 2014 6:25 PM (in response to chris)
    Re: fossilised seed?

    Hi Chris.  Here is my trigonocarpus nut finds.  Your find is something to be proud of.  Where I live, and I would guess anywhere else, they are very Hard to find.

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    Jan 14, 2014 10:03 PM (in response to chris)
    Re: fossilised seed?

    Hi Chris

    Please forgive me for asking were it was found but in the interest of I.D it would help.

     

    Tabfish

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        Jan 15, 2014 9:57 PM (in response to chris)
        Re: fossilised seed?

        Hi Chris

        Nice find! if I was you I know were my tea breaks would be spent!

        Look out for the different things, and if it's ok lets have a look.

         

        Tabfish

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        Jan 15, 2014 10:17 PM (in response to chris)
        Re: fossilised seed?

        Chris,

         

        You make me do some detective work...

        I have found a description of your quarry here

        - http://www.lancashire.gov.uk/corporate/web/?siteid=3087&pageid=7482#anchor39081

        The grid ref does not help (local map?)

        But I see it is run by Marshalls Mono,

        which has an address on Manchester Road,

        where there is a quarry. Unfortunately, that seems to be Fletcher Bank Quarry.

        But now I have found the wind farm and reservoir, I think I have your quarry (just to the west of the wind farm and NNE of Fletcher Bank Quarry).

         

        The quarry is almost completely in the Carboniferous 'Rough Rock' sandstone, ~313m yrs old.

        To quote from the BGS:

        "These rocks were formed from rivers depositing mainly sand and gravel detrital material in channels to form river terrace deposits, with fine silt and clay from overbank floods forming floodplain alluvium, and some bogs depositing peat; includes estuarine and coastal plain deposits mapped as alluvium."

         

        The Rough Rock 'is the most extensive of all of the sandstones of the Millstone Grit Group'

        (http://en.wikipedia.org/wiki/Rough_Rock)

        It is documented in C. S. Bristow's

        'Sedimentology of the Rough Rock: a Carboniferous braided river sheet sandstone in northern England',

        Geological Society of London, Special Publications, 1993, 75:291-304

        (abstract: http://discovery.ucl.ac.uk/1365521/)

         

        So, having got the context...

         

        Your specimen contains unspecified fossil plant fragments, and the lump probably is, as Dan suggests, a Trigonocarpus nut. So, to answer your original question: yes, it is 'some kind of seed'.

         

        Largely arising from Dan's questions, we have discussed Trigonocarpus nuts quite often recently here:

        - http://www.nhm.ac.uk/natureplus/message/35721#35721

        - http://www.nhm.ac.uk/natureplus/message/39426#39426

        - http://www.nhm.ac.uk/natureplus/message/38380#38380

        I think Dan's our local expert on these now!

         

         

        When 'having a look' in future, keep an eye out for trace fossils as well.

        The description here is not actually about your particular quarry, but the setting is close, so the fossils are likely to be similar

        - http://www.valleyofstone.org.uk/journey/inthebeginning/rockstrata

         

         

        Mike

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          Jan 15, 2014 10:21 PM (in response to MikeHardman)
          Re: fossilised seed?

          Good answer Mike!

           

          Tabfish

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              Jan 17, 2014 8:21 PM (in response to chris)
              Re: fossilised seed?

              Hi Chris

              I have a friend who works in a quarry as well, he found an ammonite over 2ft across and thought he had done well untill i pointed out a grean line on the side of the fossil that showed us he had left a complete whorle in the ground.

              At a guess it would have been well over 3ft.

               

              Tabfish

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