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San Gorgonio Pass
San Gorgonio Pass
View looking west toward San Gorgonio Pass. To the south (left) are Peninsular Ranges-type basement rock of the San Jacinto Mountains; to the north (right) are San Gabriel Mountains-type basement rocks of the San Bernardino Mountains that rise above foothills of Tertiary and Quaternary sedimentary materials. Photo by J.C. Matti, USGS (January, 1980).
