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

EARLIER DISPLACEMENTS OF CRUST 277
by a geometrical progression as we go backwards, clearly
these earliest suggested positions for the crust are of value
only as guides
to research.
I am suggesting three displacements of the crust in the
last 130,000 years, the intervals between being of the order
of 30,000 or 40,000 years. Considering the fact that the Wisconsin
glaciation, if it started about 50,000 years ago, had
an over-all span of about 40,000 years, it is not unreasonable
to assume similar spans for the earlier periods, though perhaps
we should allow for a considerable variation of their
lengths. Whether this rapid pace was maintained all through
the earth's history is a matter that perhaps cannot be settled
at this time; however, I will discuss it briefly further on.
So far as the Pleistocene is concerned, Suess and Emiliani,
at least, see evidence that major climatic change did take
place at that rate (409:357). Their explanation that climatic
changes resulted from the cyclical astronomical curve of
solar radiation is not convincing, for reasons already made
clear.
Much of the evidence that I will use to support this suggested
series of is displacements in the form of cross sections
of sedimentary deposits, called cores, which often singly em-
brace very long periods of time. Rather than discuss each
core separately, the simplest method will be to assemble the
evidence from all the cores, so far as it bears on each suggested
polar position
in turn. The lines of evidence include
marine cores from the Arctic, Antarctic, North Atlantic,
Equatorial Atlantic, and South Pacific Oceans, and the Caribbean
Sea; many radiocarbon and oxygen isotope findings,
pollen studies, and various evidences relating to the interglacial
periods. The purpose of the presentation of this evidence
will be to explain the known major climatic changes
of the last 130,000 years, in terms of displacements of the
earth's crust. Before attempting this reconstruction of the
glacial history of the late Pleistocene Epoch, however, we
must first discuss some of the current ideas in this field.