Thanks to Keith and Kelvin for their replies
David
-----Original Message-----
From: mining-history [mailto:[log in to unmask]] On Behalf Of Keith Nicholls
Sent: 14 June 2010 16:14
To: [log in to unmask]
Subject: Re: Caer Drewyn
David
50,000 Geological map suggests that location is pretty much slap bang on
the Bryn Eglwys Fault. The Nod Glas horizon can't be very far away, but
to say that this venture would have been a risky one is understating it
somewhat.
It is pretty common to find quarry workings near the Ordovician /
Silurian boundary - there are commonly a number of sandstone horizons
associated with it - and they provide a competent artisinal building
stone in comparison with the mudstones / shales above and below the
sequence, and I guess would have been easier to work than the older
volcanics
Keith
-----Original Message-----
From: mining-history [mailto:[log in to unmask]] On Behalf Of
Poyner, David
Sent: 14 June 2010 03:47 PM
To: [log in to unmask]
Subject: Caer Drewyn
Does anyone have any information about a couple of levels on the west
side of Caer Drewyn, just north of Corwen in Wales (SJ086445)? One level
is marked on the first series 1:2500 OS map (c1875) and by c1900 the 2nd
series version of this map shows a series of trials and a quarry. As far
as I can tell, not a lot seems to have happened at the site since then.
Thanks
David Poyner
This email has been scanned for viruses by Netshield MXSweep.
Geotechnics Limited, Registered in England No. 1757790 at The Geotechnical Centre, 203 Torrington Avenue, Tile Hill, Coventry CV4 9AP www.geotechnics.co.uk
|