| Show how glaciers aro ao lored For meil tho the joint causo cause of glaciers is preci pits tion ami arid cold A low temperature alone can call do nothing without moisture and this act fact quickly disposes of 0 the popular notion that glaciers gli ciers invariably exist in cold countries for instance and some parts of north america are destitute of ice springs though eternal cold may be said lid 6 to reign supreme in thesa these parts imagine for a moment the higher mountains clear 0 of f snow and ice and then their watch for the formation of a glacier snow falls and arid fills ills up all th the valleys an and I 1 gullies gul liea avalanches descend from the higher parts and a great accumulation gathers in all hollows dy constant repetition of snowfalls snowballs snow falls always provided a greater quantity is deposited than can be melt melted ed by the suns rays and by the natural warmth of the earths crust great p pres res sure is put upon the lower portions by the superincumbent accumulation and aided by the infiltration of water and re freezing a large body of ice is formed which at once begina to move down the valleys containing it geographical magazine |
