Pacha Qullu ( Aymara ''pacha'' world; time, ''qullu'' mountain, Hispanicized spellings ''Pacha Kkollu'', ''Pacha Kollu'', also ''Pacha Kkollu Quimsa Misa'') or Kimsa Misa (Aymara ''kimsa'' three, ''misa'' offering also spelled ''Quimsa Misa'') is a mountain in the
Andes
The Andes, Andes Mountains or Andean Mountains (; ) are the longest continental mountain range in the world, forming a continuous highland along the western edge of South America. The range is long, wide (widest between 18°S – 20°S ...
of
Bolivia
, image_flag = Bandera de Bolivia (Estado).svg
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. It is located in the Oruro Department, Litoral Province, Huachacalla Municipality, west of Huachacalla (Wachaqalla). Pacha Qullu lies northwest of Inka Qhamachu. The plain at northwest of Pacha Qullu is named Kimsa Misa Pampa ''(Quimsa Misa Pampa)''.
The mountain is a
volcano
A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface.
On Earth, volcanoes are most often found where tectonic plates ...
. While the date of the last eruption is not known, the degree of erosion suggests an age of about 8.3 million years. Originally the mountain was about higher and had a volume of . Pacha Qullu is a
Pliocene
The Pliocene ( ; also Pleiocene) is the epoch in the geologic time scale that extends from 5.333 million to 2.58lava flows and pyroclastic material. Erosion has carved radial gullies into its flanks, at whose ends alluvial fans have formed. The volcano has suffered a sector collapse, resulting in the formation of a wide and breach.
Temperatures in the closely located city of Oruro range , and precipitation is . The area is very windy. This climate has led to a xerophytic vegetation, including shrubs and tussock grass.