Anvil Rock Arch, Osage County, Missouri
Photo by Jay Wilbur
NABSQNO 15S-587966-4250000. Anvil Rock Arch is a pillar natural arch eroded through Roubidoux dolomite. It is located on private land about 3 miles south of Westphalia, Missouri. Anvil Rock Arch appears in the second edition of the Beveridge catalog as number 322. He reports a span of 16 feet.