File:The Andes of southern Peru, geographical reconnaissance along the seventy-third meridian (1916) (14782637935).jpg

Identifier: andesofsouthernp00 (find matches)
Title: The Andes of southern Peru, geographical reconnaissance along the seventy-third meridian
Year: 1916 (1910s)
Authors: Bowman, Isaiah, 1878-1950 American Geographical Society of New York
Subjects: Yale Peruvian Expedition (1911) Physical geography Geology Human geography
Publisher: (New York) Pub. for the American Geographical Society of New York by H. Holt and Company
Contributing Library: Wellesley College Library
Digitizing Sponsor: Boston Library Consortium Member Libraries

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Fig. 130. Fig. 129—Composition of slopes at Puquiura, Vilcabamba Valley, elevation 9,000feet (2,740 m.). The second prominent spur entering the valley on the left has aflattish top unrelated to the rock structure. Like the spurs on the right its blunt endand flat top indicate an earlier erosion cycle at a lower elevation. Fig. 130—Inclined Paleozoic strata truncated by an undulating surface of erosionat 15,000 feet, southwest of Cuzco.
Text Appearing After Image:
Fig. 131—Terraced, valley slopes at Huaynaeotas, Cotahuasi Valley, at 11,500 feet(3,500 m.). Solimana is in the background. On the floor of the Cotahuasi Canyon fruittrees grow. At Huaynaeotas corn and potatoes are the chief products. The section iscomposed almost entirely of lava. There are over a hundred major flows aggregating5,000 to 7,000 feet thick. CHAPTER XII THE WESTERN ANDES: THE MARITIME CORDILLERAOR CORDILLERA OCCIDENTAL The Western or Maritime Cordillera of Peru forms part ofthe great volcanic field of South America which extends fromArgentina to Ecuador. On the walls of the Cotahuasi Canyon(Fig. 131), there are exposed over one hundred separate lavaflows piled 7,000 feet deep. They overflowed a mountainous relief,completely burying a limestone range from 2,000 to 4,000 feethigh. Finally, upon the surface of the lava plateau new moun-tains were formed, a belt of volcanoes 5,000 feet (1,520 m.) highand from 15,000 to 20,000 feet (4,570 to 6,100 m.) above the sea.There we

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