2 December 2016

Friday fold: Dalradian kinks, crenulations, and folded crenulations on Arran

Posted by Callan

For the Friday fold, let’s travel to the northern edge of the Isle of Arran in southwestern Scotland, where near the town of Lochranza, you can find Dalradian metagraywackes that display a lovely suite of folds. There are kink bands, like this one:

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And this one:

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And these en echelon kink bands:

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And these:

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But there’s also a more pervasive structural fabric to be seen: symmetrical crenulations:

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And in places these highly crenulated rocks have been folded into a variety of secondary contortions:

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There’s much to be seen in and around Lochranza. I’ll return to this site in future blog posts.

In the meantime, happy Friday!