Note 6 — Chapter IV

The island of Greenland,—for it is now well ascertained that it is an island, and that the largest in the world,—this Sahara of the North, contains within its ice-plains the key to the history of the human race. For it is the largest homogeneous relic we possess of the glacial age. Such as Greenland now is, so large tracts of the world have been; and, what is of more interest to us, so has the whole of the north been. It is this mighty ice-realm that has caused a large proportion of the earth’s surface to assume its present appearance. The lowlands of Mid-Germany and Denmark have been scoured and transported thither from the rocks of Norway and Sweden. The Swedish rock at Lützen in Saxony is Swedish granite that the ice has carried with it. And the small glaciers still left in Norway, such as the Folgefond, Jostedalsbræ, Svartis,6 etc., are merely “calves” of that ancient, stupendous mass of ice that time and heat have transported, even though it once lay more than a thousand metres in thickness over widely extended plains.