The Mangatepopo Valley is a volcanically modified glacial trough. Wide-angle view looking down the valley from the Mangatepopo Saddle at 1650 m. The glacial trough is bounded by moraines from the Last Glacial Maximum and ice-worn rock slopes, but the valley floor has been filled by andesitic lava flows from the 2500-year old volcano of Ngauruhoe, whose slopes are on the left. On the distant horizon is the volcanic cone of Taranaki.