The northern wall of Mount Huascarán was destabilized,
causing a rock, ice and snow avalanche and burying the towns of Yungay and Ranrahirca.
The quake destabilized the northern wall of Mount Huascarán, causing a rock,
ice and snow avalanche and burying the towns of Yungay and Ranrahirca.
The sierra(highlands) is the region of the Andes;
it includes the Altiplano plateau as well as the highest peak of the country, the 6,768 m(22,205 ft) Huascarán.