Explorations and field-work of the Smithsonian Institution in .. . ic and the we left Las Cienegas. the country became increasingly rugged,the canyons deeper, and the scenery more inspiring. The SierraMadres are not so much a high mountain range as an elevated plateaucut into an intricate pattern of deep and rugged canyons. Although notso colorful as the Grand Canyon, being clothed in large part withverdure, these canyons (barrancas) approach it in size and even ex-ceed it in extent. In a few hours of riding, one passes from the pineforests of the summits through the live-oak a
Explorations and field-work of the Smithsonian Institution in .. . ic and the we left Las Cienegas. the country became increasingly rugged,the canyons deeper, and the scenery more inspiring. The SierraMadres are not so much a high mountain range as an elevated plateaucut into an intricate pattern of deep and rugged canyons. Although notso colorful as the Grand Canyon, being clothed in large part withverdure, these canyons (barrancas) approach it in size and even ex-ceed it in extent. In a few hours of riding, one passes from the pineforests of the summits through the live-oak and cactus zones to theriver below, where tropical fruits abound. The andesites of the lowerslopes of the barrancas are the mother rock of the principal ore veinsof this district. The rich silver camp of Maguarachic is situated onthe flanks of a narrow barranca, and from the mine one can look downinto the main Barranca de Churu, 2,000 feet below. The Barranca deMaguarachic cuts across a number of silver-bearing veins, exposingthem to view. SMITHSONIAN INSTITUTION. Fig. 3.—The Barranca de Churu, Sierra Madre Moun-tains, Western Chihuahna. These deep canyons are char-acteristic of this region.
Size: 1586px × 1575px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectscienti, bookyear1912
