A fleeting stopover at Dunbar and a wander along the coastline offered up a geological wonder. The rock formation on the shore was arranged, rather whimsically, in red and grey layers, calling to mind a Scooby snack tipped on its side.
Of course, not being a geologist, I can only speculate wildly about the rock types. The red, I dare suggest, might be Red Devonian sandstone. After all, it practically wears a label announcing itself. Apparently, such sedimentary rocks are made when sands, minerals, and even bits of organic detritus get compressed together over time.
The grey, now, requires more imaginative guessing. I would wager it to be some sort of agglomerate, cobbled together from ash and whatever rocks happened to be flying out of a volcanic vent at the time. A mere 350 million years ago, volcanic activity was all the rage around here, leaving behind the remains of two once-ferocious volcanoes, now disguised as the rather docile Bass Rock and North Berwick Law.
Leave a Reply