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SAN ANTONIO CANYON. The valley known as San Antonio Canyon begins in the Chinati Mountains in southwestern Presidio County (at 29°54' N, 104°29' W) and runs for ten miles to its mouth on the Rio Grande, 5½ miles above Adobes (at 29°50' N, 104°36' W). Its course crosses an area of igneous rocks in the Chinatis and a terrace of sandstone and tuff pebbles and terminates in the gravel pediment of the Rio Grande floodplain. The soils in the area are light reddish-brown to brown sands and clay loams, often rough and stony. The vegetation consists primarily of sparse desert shrubs. At various times since the 1880s San Antonio Canyon has been the scene of mineral prospecting. The Montgomery Mine operated there in 1885. The Burney and the San Antonio mines, on either side of the canyon, have collectively yielded less than 200,000 tons of silver and related ores through intermittent production since 1895.

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"SAN ANTONIO CANYON," Handbook of Texas Online (, accessed December 01, 2015. Uploaded on June 15, 2010. Published by the Texas State Historical Association.