In message , Chris Hogg
writes
On Mon, 12 Dec 2016 21:06:14 +0000, Vir Campestris
wrote:

On 12/12/2016 08:48, Chris Hogg wrote:
On Sun, 11 Dec 2016 21:41:46 +0000, Vir Campestris
I can beat that. Back in 1939 they put one in my garden!

It says

Boulder Clay )
? UCk ) ... ... 70 70

Which is not what I'd call a full written description.

UCk is apparently

http://www.bgs.ac.uk/lexicon/lexicon.cfm?pub=UCK

(Obsolete, but I presumably not back then)

Does this mean it was clay all the way, or there was a little bit then
the chalk?

There is a big of galvanised _something_ under one of the shrubs. I
wonder if that could be it? I keep meaning to dig it up...

Andy

AIUI:
UC = Upper Cretaceous, i.e. upper chalk deposits
K or k is the conventional abbreviation, from the German kreidezeit,
literally meaning 'chalk time' (as in K-T boundary, the division
between the Cretaceous and Tertiary geologic periods).

Boulder clay is deposited from melting glaciers ice-sheets etc. As TNP
said earlier in this thread, it's ground up rock (but not all clay is
simply that). It's basically a surface deposit covering the underlying
rocks. Thicknesses can vary widely from a few feet to many tens, even
hundreds of feet.

We have a 'galvanised something' in our garden buried under a couple
of inches of soil. It's a corrugated sheet that is partly concreted
over and covers a 5ft cubed soak-away taking rainwater off the roof.

So it's chalk based clay? Fits. There is the odd flint in it.

Possibly, although boulder clay contains a right mixture of rock
grindings from all over and would be on top of the chalk proper. No
reason why there shouldn't be some chalk in it though. Any clue as to
what the 70 70 means? Are they depths or thicknesses for example?

The galvanised thingy

http://i92.photobucket.com/albums/l17/Number774/Photo0014_zpsaf14fea4.jpg

There's something in it

http://i92.photobucket.com/albums/l17/Number774/Photo0013_zpscb681fce.jpg
that feels as if it's stuck in rubber. Probably not a soakaway... might
be the well cap. There was one somewhere once.

Andy

Oh _that_ galvanised thingy! You've posted it here before IIRC. I did
wonder if it was the top end of a simple lift pump, the thing in the
middle being the pump rod that goes up and down, operated by a lever
now long gone, rather like this http://tinyurl.com/hvcpazm But why put
a cap on it when it was dismantled?

Snap:-)

Possibly to stop small children shoving things down it:-)



--
Tim Lamb