Show Level of Sea Sank Half Mile 1 During the Ice Age Vv WASHINGTON Once Once Once early in the great Ice age about a million years ago the level of the sea was feet lower than thun It Is now and the missing water water vater wa wa- ter was piled high upon the continents continents con con- as as Ice of great glaciers This picture was presented to the National Academy of ot Sciences recently recently recently re re- by Prof Prot Francis P. P Shepard University of Illinois geologist as n result of his bis Investigations of great river cut canyons of ot the sea floor some of ot them feet below the oceans ocean's surface or about twice the depth of ot famous Grand canyon In Arizona Arlona One explanation of how they were formed Is that the coasts of ot the world were raised up above their present position during the glacial period Professor ProCessor Shepard considers consid consid- ers such a gl gigantic movement In in relatively recent times as scarcely creditable Instead he told the academicians that It Is much more reasonable that the sea level changed due to the withdrawal of water from the I oceans to form the great sheets of Ice that covered the laud and that rivers cut the underwater canyons now being discovered |