This is just incredible video, shot this week, a perfect example of one of the two main types of lava. This is A’a (ah-ah), which resembles smashed up Oreo cookie embedded in glowing molten rock. The other main type, pahoehoe, is smooth and billowy.

I am fascinated with volcanos, and have made several (stupidly dangerous) trips to walk the Kilauea lava flows in Hawaii. I’m just drawn to it.