that of the Alps, and is now entirely destitute of glaciers, yet it presents almost everywhere similar moraines, and the same polished and grooved surfaces, and waterworn cavities. The erratics, moreover, which cover it, present a phenomenon which has... A Manual of Elementary Geology: Or, The Ancient Changes of the Earth and Its ... - Seite 142 von Sir Charles Lyell - 1853 - 512 Seiten Vollansicht -
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