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
Tank Mountains Tank Mountains on the south and east is Hyder, by way of the communities of Dateland and Sentinel on Interstate 8. Tank Mountains The Tank Mountains (Yavapai: Hakimatava) are a mountain range in the Sonoran Desert of southwest Arizona; the range is part of the southeastern border of the Kofa National Wildlife Refuge. The Tank Mountains are east-west trending and about long. The highest peak is Courthouse Mountain on the west end of the range at . Black Dome also on the west end of the range is at and two minor peaks of and flank the east end of