The Andes of southern Peru . 14*50 72%o THE TOPOGRAPHIC ENGRAVING CO. WASH.,D. C. i520 Edition of 1916. THE TALE PERUVIAN EXPEDITION OF 19ILHIRAM: BINGHAM, director cotahhasi quadrang-le. Contoui* tntdvttl30l>&ot- THE PERUVIAN LANDSCAPE 193 above the valley floors, though rarely more than 3,000 feet abovethem. In the more central tracts, far from the main streams andtheir associated canyons, dissection in the present erosion cyclehas not yet been initiated, the mature slopes are still intact-, anda topographic unconformity has not yet been developed. Thehigher slopes are face
The Andes of southern Peru . 14*50 72%o THE TOPOGRAPHIC ENGRAVING CO. WASH.,D. C. i520 Edition of 1916. THE TALE PERUVIAN EXPEDITION OF 19ILHIRAM: BINGHAM, director cotahhasi quadrang-le. Contoui* tntdvttl30l>&ot- THE PERUVIAN LANDSCAPE 193 above the valley floors, though rarely more than 3,000 feet abovethem. In the more central tracts, far from the main streams andtheir associated canyons, dissection in the present erosion cyclehas not yet been initiated, the mature slopes are still intact-, anda topographic unconformity has not yet been developed. Thehigher slopes are faced with rock and topped with slowly movingwaste. Ascent of the spur end is by steep zigzag trails; once thetop is gained the trail runs along the gentler slopes without spe-cial difficulties. It is worth noting at this point that the surface of erosion stillolder than the mature slopes lierewith described appears not tohave been developed along the seventy-third meridian of Peru, orif developed at one time, fragments of it no longer remain. Thelast well-developed remnant is southwest of Cuzco, Fig. 130. Ihave elsewhere described the character and geographic distribu-tion of this oldest recogn
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Keywords: ., bookcentury1900, bookdecade1910, bookidandeso, booksubjectgeology
