sentences:  Since then the mountain has undergone a number of glaciations, but only the more recent one can be chronologically complete due to each new glaciation eroding the moraines of the previous ones, if the glaciers advance over them.Glaciations in East Africa are associated with a colder, drier climate when the precipitation is less, but the extra temperature drop means any solid precipitation stays.Stratus cloud, which probably dominated during some of the glaciations would have provided insulation but little precipitation.