Killerton House, Devon

One of our local geologists has sent the following:- " . . . . at Killerton House, Devon, where the building blocks are of fine black basalt, and the browner or purplish vesicular varieties are built into the gateway of the entrance yard. These are known as minette. They came from a localised outcrop on the estate, and have been dated as 290 MA - the Carboniferous-Permian boundary. What was new to me is a booklet on the local geology, available from the NT bookshop there:-  'Killerton - The Rocks Beneath. A Short Guide to the Geology' by Dr Richard Edwards, the Cullompton Press 2004 £1.99. The 15 good illustrations are in colour and show rock-types and buildings, as well as a sketch map and section."