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
Cathedral Range Cathedral Range The Cathedral Range is a mountain range immediately to the South of Tuolumne Meadows in Yosemite National Park. The range is an offshoot of the Sierra Nevada. It includes Cathedral Peak, Unicorn Peak, Eichorn Pinnacle, Echo Peaks, Echo Ridge, Matthes Crest, and Cockscomb. The mountains were formed by glaciers carving out the granite material. The tops of the peaks in the range were above the level of the highest glaciation, and are therefore un-eroded and distinctly spire-like. The range is named after Cathedral Peak, which resembles a cathedral spire. The range runs beside the two Cathedral Lakes, just