Ch'iyar Qullu (Oruro)

This article is about the mountain in the Ladislao Cabrera Province, Oruro Department, Bolivia. For other uses, see Ch'iyar Qullu.

Ch'iyar Qullu (Aymara ch'iyara black, qullu mountain,^[3] "black mountain", also spelled Chiar Kkollu) is a volcanic centre in Bolivia. It is located in the Oruro Department, Ladislao Cabrera Province, Salinas de Garci Mendoza Municipality, northeast of Salinas de Garci Mendoza, near a maar named Jayu Quta ("salt lake").^[4]

Ch'iyar Qullu
Ch'iyar Qullu Location in Bolivia
Highest point
Coordinates	19°26′00″S 67°23′00″W[1][2]
Geography
Location	Bolivia, Oruro Department, Ladislao Cabrera Province
Parent range	Andes

It is a sill formed from primitive phyric alkali basalt that closely resembles ocean island basalt in composition and now appears as a hill. The rocks contain augite and olivine and the eruption site coincides with a local lineament^[2][5] and is of Miocene age,^[6] with dates of 22.51±0.45 mya by Ar-Ar dating and 25.2±0.5 mya by K-Ar dating.^[5] The Ch'iyar Qullu magmas are Central Andes intraplate magmas and originate from the upper mantle.^[7]