button to main menu   Old Cumbria Gazetteer
place:- stone wall, Borrowdale
parish Borrowdale parish, once in Cumberland
county:- Cumbria
stone wall; geological site
coordinates:- NY26982089
10Km square:- NY22

1Km square NY2620


stone wall, Borrowdale -- Borrowdale -- Cumbria / -- 24.8.2008

stone wall, Borrowdale -- Borrowdale -- Cumbria / -- The curbstones are also the same stone. -- 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.

Old Cumbria Gazetteer - JandMN: 2013

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©  Martin and Jean Norgate: 2014
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