Geonomy a Theory of the Ocean Currents And Their Agency in the Formation of the
Geonomy a Theory of the Ocean Currents And Their Agency in the Formation of the
J Stanley James Stanley Grimes
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The causes of the drift are unknown. Several ingenious theories have been suggested in relation to it, but none that accounts for all the facts. It seems to be proved that a large portion of the 100 DEIFT FOKMATION. drifted territories were covered by glaciers, analo- gous to those which abound at the present time in some of the Alpine regions of Europe. The sur- faces of many rocks, over which the drift passed, are smoothed, and some of them scratched, in pre- cisely the same manner as those r...ocks are which glaciers are well known to have acted upon in Switzerland. In many places the ground is fur- rowed, or raised into groups of oblong mounds which glaciers alone could produce. Any proper theory of the drift must show: 1st, the condition of things previous to its commencement ; 2d, the nature of the changes which caused the drift ; 3d, the changes which brought it to a close. It must also explain the existence of glaciers, boulders and gravel ; and, above all, why the course of the drift was south-east.
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