Lowell, Percival, 1855-1916 · New York, The Macmillan company · leaf 237
e lack thenecessary quantitative data, but wholly to study of ourneighbor in space. Had any one informed our geologiccolleagues that they must look to the sky for definiteinformation about the cause of an Ice Age, they wouldprobably have been surprised. 200 THE EVOLUTION OF WORLDS With this Martian… … Glacial map of Eurasia — after James Geikie. equatorial regions, contemporaneous with glacial periods,indicates. But another and probably the ^chief factorinvolved was not a generally increased precipitation,potent as that would be, but an increased snow depositdue to temporary elevation of the…
Cosmogony
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
