Very good stuff. Simple explanation for a highly complicated subject. I wish I watched this video before my trip to Iceland as I would have understood more my surrounding.
Even if you’re not fond of natural science (I’m not), you should still watch it if you plan a visit Iceland. Nature is a big part of Iceland. Chances are you’ll emerge in it during your entire time there. The earth, the volcanoes, and others will be your main experiences.
https://www.youtube.com/watch?v=SDxdLhw_Jfw