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

EARLIER DISPLACEMENTS OF CRUST 273
It would also indicate that the ice sheet at this time was
about a mile thick, while the Labrador ice sheet, at least
in its later phases, was not nearly so thick (375:169). The
suggestion here is strong that the pole was in Hudson Bay
itself, and that the Labrador ice sheet began to develop
when the main ice sheet was wasting. It is possible that it
took over as the glacial center because the supply of moisture
to feed the thinning icecap was better nearer the coast. This
might have been the result, in part, of the opening up of
water areas by the shrinking of the icecap.
Now, it follows logically that if the Wisconsin ice sheet
existed because the Hudson Bay region lay at the pole, and
if it disappeared because of a displacement of the crust that
moved North America away from the pole, then the Wiscon-
sin ice sheet must have been brought into existence as the
result of an earlier displacement. The question, therefore,
now arises, Where was the pole situated previous to its loca-
tion in or near Hudson Bay? It also becomes important to
establish as closely as possible the date of this earlier dis-
placement.
We have already discussed the date of the beginning of the
climatic change that produced the Wisconsin glaciation. A
considerable amount of evidence has now accumulated that
there were Wisconsin glacial phases earlier than the Farm-
dale (133). Furthermore, we must remember that the Farm-
dale date of 25,000 years ago is only the date of the invasion
of Ohio by the ice sheet, which had previously to advance a
long way from its center of origin. Evidence to be presented
below will strongly support the conclusion that the beginning
of the change of climatethat is, of the movement of
the crust that eventually produced the Wisconsin icecap
was about 50,000 years ago. This date, as we shall see, is
not in conflict with evidence of cold climate in the North
Atlantic extending back considerably further.
With the date of the beginning of the Wisconsin glacia-
the use
tion tentatively fixed in this fashion, it is possible, by