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638 Views 1 Reply Last post: Oct 11, 2012 12:12 PM by Jam RSS
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Sep 11, 2012 5:26 PM

Is this a fossil sea sponge ?

Found this very round flint stone (about 10cms across ) in my garden at St Olaves, Great Yarmouth, Norfolk. Looking at other posts it would appear to be a fossilised sea sponge.  Please advise whether this is correct and approximately what age (100million years old?). Many Thanks. I have attached a couple of photos

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    Oct 11, 2012 12:12 PM (in response to jim)
    Re: Is this a fossil sea sponge ?

    hi

    i think its unlikely to be a sponge, sponges usualy have one very large hole at the top where all the water flows out of the sponge. that is how they feed; filltering the water of its particals and venting the water out through the hole.

    it looks to me to be a rounded flint bolder, probably has spent a very long time in a river or on the beach being ground into this shape.

    maybe it was its shape that someone liked and brought it back as a garden ornament?

    dont think its a fossil

    sorry for the bad news, but keep looking!

    happy hunting

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