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

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EARTH'S SHIFTING CRUST
sand years a warming of the climate would be noticeable
in the areas moving equatorward, and a cooling of the
climate would occur in areas moving poleward, but these
long-term trends of change would often be modified or
even reversed by other factors. Massive volcanism would
erupt before the crust had moved far, and the effect might
be to check the retreat of the icecap, and even to cause its
readvance after it began to retreat. We can see that this seems
to have happened with the Wisconsin icecap: for thousands
of years after it began to grow thinner, and to retreat, it
went through phases of readvance.
Before the final disappearance of glacial sediment from the
Ross Sea bottom about 40,000 years ago, then, we must assume
that the icecap then in Antarctica had gone through
an initial phase of very gradual retreat, followed by perhaps
several phases of readvance, until finally it withdrew entirely
from the Ross Sea coast, and melted sufficiently to permit
free-flowing rivers to bring down temperate-type sediment
from the interior. It seems obvious, on the analogy of the
Wisconsin icecap, that we should allow a period of time of
the order of 10,000 years or so for this entire process. This
suggests, then, that the movement of the crust began about
50,000 years ago. However, it does not mean that the movement
ended 40,000 years ago; it might even have continued for
another 10,000 years. The cores contain no evidence on that
point. It may have taken much more than 10,000 years to
shift the crust. The core evidence, however, may be used to
support the thesis that the crust displacement that brought
the Hudson Bay region to the pole started about 50,000 years
ago. In the following discussion we will tentatively consider
that the previous position of the pole was in southern Green-
land.
a. The Arctic Cores
In the last few years Soviet expeditions in the Arctic Ocean
have taken a number of deep-sea cores, and have dated them