Earth Features and Their Meaning An Introduction to Geology for the Student and the General Reader
CHAPTER XX
THE GLACIERS OF MOUNTAIN AND CONTINENT
Conditions essential to glaciation—The snow-line—Importance of mountain barriers in initiating glaciers—Sensitiveness of glaciers to temperature changes—The cycle of glaciation—The advancing hemicycle—Continental and mountain glaciers contrasted—The nourishment of glaciers—The upper and lower cloud zones of the atmosphere 261