NABSQNO 10T-622550-4621220

NABSQNO 10T-622550-4621220.
Symbol Bridge, Siskiyou County, California
Photos by Jay Wilbur

NABSQNO 10T-622550-4621220. Symbol Bridge is a lava natural arch that resulted from the partial collapse of the basalt roof of one of the dozens of the lava tubes formed by the Modoc Crater flow, which occurred about 30,000 years ago. It is a major feature within the Lava Beds National Monument, in Siskiyou County, California. The Symbol Bridge trail leads to this arch.

Symbol Bridge derives its name from several pictographs (some pictured in the insert above) that prehistoric Indians painted on its walls. Vreeland listed this arch in his catalog as number 21-2, and reported a span of 8 feet.

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© 2011 by Jay H. Wilbur, All Rights Reserved.