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:
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.
Happy Friday!
The photographs are really good. Are there other types of flow structures observed there?
I’ll bet someone more familiar with the details of Icelandic geology than me would be able to point you to plenty of examples. The whole island is lava flows, right? So surely a lot of them show similar structures.