Between a rock and a hard place

A virtual rock walk around Walltown Quarry, Northumberland. Describing the geology and history of the quarry and the Whin Sill.
Chance, Luck, Errors in Nature, Fate, Destruction As a Finale by Chris Zabriskie is licensed under a Creative Commons Attribution 4.0 license. creativecommon...
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#northumberland #geology #rocks #northumberlandnationalpark #dolerite #whinsill #walltown #walk #hike #history