Lavacicles, a common feature, are squeezed out of a lava tube’s roof by gases under high pressure and then cooled mid-drip. The gooey appearance of a rock wall in Manu Nui cave was formed when ...

Saturday night’s rapid lava flows had slowed to a steady trickle by Sunday morning, but the molten rock nonetheless reached Grindavik’s eastern wall of defense. Icelandic police declared a ...