An unnamed arch in El Malpais National Monument, New Mexico
Photo by Jay Wilbur
Example Lava Natural ArchNABSQNO 12S-764744-3870878. This unnamed arch is one of a series of lava natural arches that were formed due to the collapse of most of the roof of a large lava tube. This tube and its arches are located in El Malpais National Monument, Cibola County, New Mexico. The pictured arch has a span of 50 feet. Access is via rough dirt roads followed by a short, well-marked, but hazardous hike over lava. Vreeland listed this arch as number 17-8 in his catalog.
Other Lava Natural Arch examples: