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

EARLIER DISPLACEMENTS OF CRUST 307
A small amount of additional evidence for our assumed
sequence of climates in Alaska has come to light. Our assumptions
call for a frigid climate in Alaska down to about 75,000
years ago, with a warming of the climate coinciding with the
refrigeration of the Atlantic as the polar position migrated
to Greenland. Then, about 25,000 or 30,000 years ago, the
climate was refrigerated (later than in eastern North Amer-
ica) as a consequence of the advance of the Wisconsin ice
sheet.
Karlstrom (247) has shown through radiocarbon dating
that the oldest glacial stage of the Wisconsin glacial period
in Alaska began not earlier than the Farmdale Advance in
Ohio, 25,000 years ago, and not later than 19,000 years ago.
This is in accord with our supposition that the glacial climate
advanced from the east. Before this Alaskan glacial
back an un-
stage, Karlstrom has an interglacial extending
certain distance. This, obviously, is, in terms of current
theory, in disaccord with the contemporary climatic trends
in the Atlantic. Before the interglacial period Karlstrom
notes evidence of a glaciation that he considers to be pre-
Wisconsin but post-Illinoisan. Since this glaciation was be-
yond the range of the radiocarbon method, he had to depend
upon the assumption of climatic control by the solar insola-
tion curve in order to estimate its date. He estimates that
this older glaciation was at least 47,000 but not more than
87,000 years ago. Presumably these dates mark the estimated
time of the end of the glaciation. Even though his basis of
calculation may not seem acceptable (for reasons already dis-
accord with
cussed), it is plain that his date is in pretty good
our date for the Alaskan pole. No doubt it is based in part
on a lot of stratigraphic studies that prove the antiquity of
the glaciation, and at the same time show that it is younger
than the Illinoisan ice age.
This climatic reconstruction throws an interesting light on
a forgotten item of paleontological research that I chanced
upon in the Smithsonian Miscellaneous Collections for 1913.
It was entitled "Notice of the Occurrence of a Pleistocene