Wednesday 1 December 2021

Xenoliths on Criffel

 

Criffel is a mountain made of a granite intrusion - the granite is white with flecks of mica, not pink like Shap. But its best trick is the presence of xenoliths where bits of the country rock around the intrusion have fallen into the magma and been baked in as it cooled and solidified. I've found small examples on the beach at Silloth before but there were huge examples in rocks in and around the lovely new path up from Ardwall.