B.

Clarke, it appears also that there are traces of former glacial action on the mountains of the south- eastern corner of Australia.

Looking to America: in the northern half, ice-borne fragments of rock have been observed on the eastern side of the continent, as far south as latitude 36 and 37 degrees, and on the shores of the Pacific, where the climate is now so different, as far south as latitude 46 degrees.

Erratic boulders have, also, been noticed on the Rocky Mountains.

In the Cordillera of South America, nearly under the equator, glaciers once extended far below their present level.