17 June 2016

Friday fold: isoclinal flow structures in Icelandic lava

Posted by Callan

While soaking at some fine outdoor hot springs in southern Iceland (near Höfn) last week, I spied a Friday fold on the rock wall above the hot pots:

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Iceland is not a place where we would expect to find ductile folds in already-lithified rocks, so I’m guessing that these are folds related to flow in the lavas as they erupted at the surface.

IMG_3863

Happy Friday!