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

NORTH AMERICA AT THE POLE
than is the case in Antarctica, and the centrifugal effect ac-
cordingly would have been much greater in proportion to
the quantity of ice.
If the pole was situated in the Hudson Bay region, the
closeness of the sea would have been a factor aiding the rapid
growth of the icecap, and giving less time for possible
isostatic adjustment.
An additional observation worth making, perhaps, is that
if this vast ice sheet had developed so rapidly at the present
latitude of Hudson Bay, the centrifugal effect would have
been colossal. If the centrifugal effect of the Antarctic icecap,
with its center of gravity 345 miles from the pole, is sufficient
to produce a bursting stress almost equal to the estimated
tensile strengths of the crust, the smaller North American ice-
cap, with its center of gravity about 2,500
miles from the
pole, would have produced a bursting stress many times
greater than the crustal strength. Why this must be so, the
reader may see by referring to Figure XII (p. 343). On this
plate, the second parallelogram represents the centrifugal
effect of the present Antarctic icecap on the assumption that
the icecap could be displaced, without melting, as far as the
45th parallel of latitude. It is evident that at the 45th parallel
the centrifugal effect would be approximately six times
greater than the effect produced by the icecap with its center
of mass where it is now, about 345 miles from the pole. The
bursting stress would be increased in proportion, being al-
ways 500 times the centrifugal effect (Chapter XI).
unreasonable to suppose that at the end of the ice age the
It seems
crust could have withstood a stress six times greater than
our present estimate of its strength.
The reader is free to conclude from the foregoing, either
that the North American icecap must have been a polar ice-
cap (because it could never have developed to its full size at
the present low latitude of the glaciated region without mov-
ing the crust) or that the movement of the crust from any
such agency is impossible. But, as we have seen (Chapter VI),