Rock Identification

Amitrai Luchmeeparsad · July 2020

Anyone can tell me which rock is this please? I was building a soakaway and started hitting big chunks of white/greyish rocks about a metre down in clay soil. It breaks quite quickly and I am sure I have found these used as garden wall in the area. I live in Surrey. See picture of rock.

I also noticed small coal like rocks scattered all around the ground. Some are hard solid and others were crumbling. What are these? See photos.

Many thanks
Amit

Image: https://us.v-cdn.net/6030279/uploads/editor/yj/29omqilc60kq.jpg

Image: https://us.v-cdn.net/6030279/uploads/editor/sw/vnc9xawlaqeb.jpg

Buttercupdays · July 2020

Top pic probably is coal. Not that uncommon to find it in gardens, many people had coal fires in the past.

Bottom pic looks like a bit of rendered wall. Render will break up quite easily, other candidates, like granite or limestone chippings won't.

Dovefromabove · July 2020

Bottom pic is flint.

BobTheGardener · July 2020

One for Time Team I think!

Bijdezee · July 2020

Dove is right, bottom one is flint, used to get a lot on the headland where I lived and as kids we used to break large stones open with hammers (no eye protection) to look at the insides.

Dovefromabove · July 2020

Half the buildings here in Norfolk are built with flint

https://www.britainexpress.com/counties/norfolk/norwich/guildhall.htm

and it was mined just down the road from here

https://www.english-heritage.org.uk/visit/places/grimes-graves-prehistoric-flint-mine/

Rock Identification

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