Geology of Chile the Taitao Peninsula, the Peru–Chile Trench subduction zone is the boundary between the South American and Nazca Plates. At Taitao, the Chile Triple Junction and the Nazca Plate subduct the South American Plate. In Norte Grande the mountains form a series of plateaus, such as Puna de Atacama and the Altiplano. At a south latitude of 27 degrees, Chile's highest mountain (Ojos del Salado) reaches a height of . Below 42 degrees south, the Andes split into a fjord landscape and the highest mountain is Monte San Lorenzo at . As the mountains ebb, the snow line lowers; in the
Clearwater Mountains Clearwater Mountains The Clearwater Mountains are part of the Rocky Mountains, located in the panhandle of Idaho in the Western United States. The mountains lie between the Salmon River and the Bitterroot Range and encompass an area of . The North Clearwater Mountains is the northernmost and shortest subrange. The subrange is in area. Only two of its peaks — the Pot Mountain and the Black Mountain — rise above . The Selway Crags lie between the North and South Clearwaters both in latitude and mean elevation. The Selway Crags encompass and its two highest peaks are the Grave Peak