The Earth's Shifting Crust by Charles Hapgood - wire of information

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EARTH'S SHIFTING CRUST
To begin with, it is clear that a massive centrifugal effect
must have been created by the Wisconsin ice sheet, if the
considerations presented in Chapter VI are sound. Radioelement
dating has shown that the ice sheet developed in a very
short time. A high degree of isostatic compensation of the
icecap is therefore unlikely, even if isostatic compensation
could really eliminate the effect.
It is significant that the Wisconsin ice sheet was asymmet-
rical in its distribution about the center from which it spread.
If we assume that the ice center from which the icecap
radiated coincided at that time with the pole, then this
asymmetrical
distribution must have resulted in a centrifu-
gal effect. Furthermore, it appears that the great bulk of the
ice lay to the south of the ice center, and so therefore the
direction of the resulting centrifugal thrust would have been
southward, and the result would have been to shift the Hudson
Bay region due south from the pole toward its present
latitude. This is indeed in remarkable agreement with the
theory. The facts are reported by W. F. Tanner, writing in
Science, under the title "The North-South Asymmetry of the
Pleistocene Ice Sheet" (414).
There are some comparisons between this North American
icecap and the present icecap in Antarctica that are worth
making. The North American icecap is thought to have covered
about 4,000,000 square miles, as compared with the
nearly 6,000,000 square miles of the present Antarctic cap.
It may be asked, Why should the smaller North American
icecap have started a slide of the earth's crust, when this
larger one in Antarctica has not? The answer to this appears
to lie in the different degrees of eccentricity, or asymmetry,
of the two icecaps. In Antarctica, the pole is fairly near
the center of the continent, so that the real asymmetry of the
icecap is not at first glance apparent.
In North America the
presumed pole in Hudson Bay or perhaps in western Quebec
was on the eastern side of the continent, quite near the sea.
In this situation, the icecap was more eccentric. Its center
of gravity was in all probability much farther from the pole