Archive for the tag 'History of Animals'

Glaciers

       A “glacier” is a thick mass of ice which moves over the ground under the unfluence of gravity. It originates on land from the compaction and recrystallization of snow-Glaciers form in places where more snow accumulates each year than that melts away. They are found chiefly in high lattitudes as in the Arctic region, or at high elevations as on the Himalayan mountains above the snow line. The “snow line” is lower limit of accumulating snow. Below the snow line the snow melts in Summer.

 Types of Glaciers:
                   There are three kinds of glaciers

 (i) Valley glaciers,  (ii) Piedmont glaciers and (iii) Ice sheets

 (i) Valley glaciers:-
                      The glaciers which originate near  the crests of high mountains and move along the valleys just like rivers are called “Val