Thin Pahoehoe Lava layers at the Gerlingadalur Volcano by Dr. Holly Spice. Hidden Iceland (5). Posted on March 29, 2021March 29, 2021 VOLCANIC ERUPTION IN ICELAND 1441 × 833 Thin Pahoehoe Lava layers at the Gerlingadalur Volcano by Dr. Holly Spice. Hidden Iceland (5). Thin Pahoehoe Lava layers at the Gerlingadalur Volcano by Dr. Holly Spice. Hidden Iceland (5).