Ragnarok : the age of fire and gravel

CAUSED BY CONTINENTAL ICE-SHEETS? 39

And we are not without evidences that the driftdeposits are found in Africa. We know that they extend in Europe to the Mediterranean. The “Journal of the Geographical Society” (British) has a paper by George Man, F.G.S., on the geology of Morocco, in which he Says:

“Glacial moraines may be seen on this range nearly eight thousand feet above the sea, forming gigantic ridges and mounds of porphyritic blocks, in some places damming up the ravines, and at the foot of Atlas are enormous mounds of bowlders.”

These mounds oftentimes rise two thousand feet above the level of the plain, and, according to Mr. Man, were produced by glaciers.

We shall see, hereafter, that the sands bordering Egypt belong to the Drift age. The diamond-bearing gravels of South Africa extend to within twenty-two degrees of the equator.

It is even a question whether that great desolate land, the Desert of Sahara, covering a third of the Continent of Africa, is not the direct result of this signal catastrophe. Henry W. Haynes tells us that drift-deposits are found in the Desert of Sahara, and that—

“In the bottoms of the dry ravines, or wadys, which pierce the hills that bound the valley of the Nile, I have found numerous specimens of flint axes of the type of St. Acheul, which have been adjudged to be true palxolithic implements by some of the most eminent cultivators of prehistoric science.” *

The sand and gravel of Sahara are underlaid by a deposit of clay.

Bayard Taylor deseribes in the center of Africa

**“The Paleolithic Implements of the Valley of the Delaware,” Cambridge, 1881.