National Geographic : 1955 Oct
563 Kodachrome by Thomas J. Hargrave Volcanic Bombs, Blown Skyward by Exploding Steam, Rain on the Cone Fiery boulders cool even as they fall, but many still glow upon the ground. Sticking together, they build up a cone 150 feet high. In the center a cataract of molten stone breaks through the dam; its speed may reach 30 miles an hour. Farmers fled to safety as the incandescent stream swept across papaya, coffee, and sugar-cane fields. As it fanned out, the lava slowed to a crawl and cooled to a wall of cokelike clinkers.