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971 Views 1 Reply Last post: Sep 8, 2013 7:56 AM by MikeHardman RSS
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Sep 7, 2013 9:38 PM

what sort of rock is this?

Found in hills coastal west Wales. Looks like a huge almond. Weighs 2kg. Notice £1 coin on slated bench for scale.

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    Sep 8, 2013 7:56 AM (in response to antonypod)
    Re: what sort of rock is this?

    Superficially, it looks like a concretion.

    But its surface texture is intriguing, likewise its symmetry (though concretions are often symmetrical).


    Please tell ue more about it:

    - the location more precisely (town, bay, grid ref, etc.)

    - its density (numerically would be great, but a general impression would be useful - ie. heavy or light for its size, compared with normal rock or concrete)

    - is a magnet (including a compass needle) attracted to it?

    - is a non-magnetized steel or iron object (eg. a pin or kitchen knife) attracted to it?

    - anything about where you found it (loose on the beach or in the rock face, what fossils or minerals were nearby, any industrial workings nearby, etc.)

    - was there just this one, or were these some/many others?



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