An unnamed pothole natural arch, San Juan County, New Mexico
Photo by Larry Beck
NABSQNO 13S-254885-4075475. This unnamed pothole natural arch has eroded through San Jose Formation sandstone. It is located about 14 miles east of Aztec, San Juan County, New Mexico. Access is via a complex of mineral exploration roads (dirt) stemming north from highway 173. The arch has a span of about 14 feet.