Woodpecker Rock in El Morro National Monument, New Mexico
Photo by Jay Wilbur
Example Irregular Natural ArchNABSQNO 12S-740954-3880755. Woodpecker Rock must be considered a true natural arch, but does not fit into any of the taxonomy types. Therefore, it must be classified as an irregular natural arch. It is closest to a propped natural arch, but its odd lintel disqualifies it from that classification. It has eroded through Zuni sandstone.
Woodpecker Rock is located in El Morro National Monument in Cibola County, New Mexico. Vreeland included it in his catalog as number 17-7 and reported a span of 6 feet.
Other Irregular Natural Arch examples: