button to main menu  Old Cumbria Gazetteer
stone wall, Borrowdale
civil parish:-   Borrowdale (formerly Cumberland)
county:-   Cumbria
locality type:-   stone wall
locality type:-   geological site
coordinates:-   NY26982089
1Km square:-   NY2620
10Km square:-   NY22
amateur geology
stratigraphy:-   mudstone; siltstone
stratigraphy:-   Ordovician; Arenig


photograph
BPQ08.jpg (taken 24.8.2008)  
photograph
BPQ09.jpg  The curbstones are also the same stone.
(taken 24.8.2008)  

notes:-  
In this area the rock is a brecchia, a mud flow of volcanic ashes, a tuff, with angular fragments of broken Skiddaw group mudstones; this is perhaps a lahar? This is at the edge, the lowest/earliest layers, of the Borrowdale Volcanic Group. The Borrowdale volcanics started with a bang, as an eruption broke through the overlying mudstones at the end of the Ordovician period. The volcanism caused by the subduction zone on the margin of the Iapetus Ocean which was closing. The rocks are iron stained, red.
NB: beware my amateur geological knowledge.

button to lakes menu  Lakes Guides menu.