An unnamed buttress natural arch, Marion County, Arkansas
Photo by John Burns
NABSQNO 15S-541690-3995915. This unnamed buttress natural arch has eroded through St. Peter sandstone. It is located in a bluff above the Buffalo River in southeast Marion County, Arkansas, about 5 miles northwest of the small community of Cozahome. The arch is on federal land that is part of the Buffalo National River complex. It has a span of about 20 feet.