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This is especially important during monsoon season, when flash floods can make traversing the narrow slot canyons extremely hazardous.The unusual surface of the canyon walls was formed by flash floods that carved away at the soft Navajo sandstone.

Define slot canyon. slot canyon synonyms, slot canyon pronunciation, slot canyon translation, English dictionary definition of slot canyon. n. A very narrow canyon usually of sandstone or limestone that has a depth considerably greater than its width. American Heritage® Dictionary of the English...