Incahuasi Central Volcanic Zone of the Andes together with about 110 other Quaternary volcanoes, and lies in the southern sector of the volcanic zone; other volcanic zones in the Andes are the Northern Volcanic Zone, the Southern Volcanic Zone and the Austral Volcanic Zone. The history of volcanic activity is poorly known for most of these volcanoes owing to the lack of dating; only a few historical eruptions have been recorded, such as an eruption at Ojos del Salado in 1993. Incahuasi is located northeast of Ojos del Salado, the highest volcano in the world. Both volcanoes are found at the
Mountains of Azerbaijan peaks of the mountain range. The highest peak of the Greater Caucasus is Mount Bazarduzu, which is situated 14,652 feet (4466 meters) above the sea level, is also the highest point in Azerbaijan. The mountains of the Greater Caucasus are located in the region of high degree of seismic activity. The mountains are formed by rocks that date back to Jurassic and Cretaceous periods. The Lesser Caucasus is the second important mountain range in Azerbaijan and forms its south-western borders. Mount Murovdag and Mount Zangezur are the main ridges of the Lesser Caucasus. They are formed by sedimentary and volcanogenic