Ragnarok : the age of fire and gravel

98 THE COMET.

and folds around such impediments, and wears them away ; the wind does not. Compare the following representation of a well-known feature of the Drift, called

Crac anp Tait.—c, crag; f, till.

“crag and tail,” taken from Geikie’s work,* with the drifts formed by snow on the leeward side of fences or houses.

The material runs in streaks, just as if blown by violent winds :

“ When eut through by rivers, or denuded by the action of the sea, ridges of bowlders are often seen to be inclosed within it. Although destitute of stratification, horizontal lines are found, indicating differences in texture and color.” f

Geikie, describing the bowlder-clay, says :

“Tt seems to have come from regions whence if is hard to see how they could have been borne by glaciers. As arule it is quite unstratified, but traces of bedding are not uncommon.”

« Sometimes it contains worn fossils, and fragments of shells, broken, crushed, and striated ; sometimes it contains bands of stones arranged in lines.”

In short, it appears as if it were gusts and great whirls of the same material as the “till,” lifted up by the cyclones and mingled with blocks, rocks, bones, sands, fossils, earth, peat, and other matters, picked up with terri-

* “The Great Iee Age,” p. 18. + “ American Cye!opedia,” vol. vi, p. 112.

oni