Mount Chilalo

Mount Chilalo
Chilalo
Chilalo is located in Ethiopia
Chilalo
Location in Ethiopia
Elevation 4,036 m (13,241 ft)
Location
Location Arsi Zone, Oromia Region, Ethiopia
Coordinates 7°55′N 39°16′E / 7.917°N 39.267°E / 7.917; 39.267Coordinates: 7°55′N 39°16′E / 7.917°N 39.267°E / 7.917; 39.267

Mount Chilalo is an isolated, extinct silicic volcanic mountain in southeastern Ethiopia. The highest point in the Arsi Zone of the Oromia Region, and located on the border between the Hitosa and Tiyo woreda, this mountain has a latitude and longitude of 07°55′N 39°16′E / 7.917°N 39.267°E / 7.917; 39.267 with an elevation of 4,036 metres (13,241 ft) above sea level.

The mountain has an elliptical base (about 30 by 20 kilometers), whose major axis lies NNE-SSW or parallel to the predominant tectonic trend. Chilalo rises with gentle slopes for more than 1500 meters from the top of the plateau. At the summit, there is a large, almost circular caldera about 6 kilometers in diameter, whose southern rim is considered to be the mountain's summit. Mount Chilalo last erupted in the Pleistocene.[1]

One authority identifies Mount Chilalo as a late Trap Series volcano.[2] The geologist Erik Nilsson claimed to have identified traces of glaciation on Chilalo, as well as on its neighbor Mount Kaka down to about 3400 meters, which he dated to the "Last Pluvial Period".[3] Although this mountain is located south of the Great Rift Valley, along with Mount Gugu to the north and Mount Kaka to the south, it is considered, geologically speaking, part of the Ethiopian Highlands.

Notes

  1. ^ Cilallo Volcano - John Seach, Volcano Live website (accessed 1 November 2009)
  2. ^ "Local History in Ethiopia" The Nordic Africa Institute website (accessed 19 December 2007)
  3. ^ Erik Nilsson, "Traces of Ancient Changes of Climate in East Africa: Preliminary Report", Geografiska Annaler, 17 (1935), pp. 13f

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