Overview
Iliniza Sur is a mountain in the Andes of Ecuador. It has a height of 5,263 metres.
Description
Illiniza is a glacier-covered stratovolcano 55 km southwest of Quito, Ecuador. It has 2 peaks 1.8 km apart, Illiniza Sur (5248 m) and Illiniza Norte (5126 m) and forms a prominent landmark west of the Interandean valley.
Iliniza Norte is the remnant of the older volcanic edifice, while Iliniza Sur is a younger stratovolcano of andesitic-dacitic composition. It contains a caldera filled by lava flows and domes and is surrounded by thick pyroclastic flow deposits. 2 lava domes are located on the southern and NE flanks of the complex.
Most activity of the heavily eroded Iliniza volcano took place before the Holocene, but the Tishigcuchi (Rasuyacu) lava dome on the southern flank was active during the past 10,000 years.