sentences:  There was a temperature minimum over 3.7-2.5 kya and also during the little ice age spanning the years 1300-1900 when a permafrost regime dominated on Mount Kenya.Mount Kenya used to be covered in an ice cap, which eroded the mountain to expose the volcanic plugs which form the current summit.This would have been caused by a cooler climate and the fact that the mountain reached an altitude of between - resulting in colder temperatures.