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

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EARTH'S SHIFTING CRUST
sunny August day in North America. The dry, wilting glare and
perspiration made the thought of an ice sheet thousands of feet thick
at that very spot most incredible, but most alluring (87:124).
When these facts were established, geologists sought to explain
them by assuming that, at periods when these areas
were glaciated, they were elevated much higher above sea
level than they are now. Theoretically, even an area near
the equator, if elevated several miles above sea level, would
be cold enough for an ice sheet. What made the theory plausible
was the well-known fact that the elevations of all the
lands of the globe have changed repeatedly and drastically
during the course of geological history. Unfortunately for
those who tried to explain the misplaced icecaps in this way,
however, Coleman showed that they reached sea level, within
the tropics, on three continents: Asia, Africa, and Australia
(87:129, 134, 140, 168, 183). At the same time, W. J. Hum-
phreys, in his examination of the meteorological
factors of
glaciation, made the point that high elevation means less
moisture in the air, as well as lowered temperature, and is
therefore unfavorable for the accumulation of great icecaps
(232:612-13).
5. World-wide Phases of Cold Weather
A widely accepted assumption with which contemporary
geologists approach the question of ice ages is that the latter
occurred as the result of a lowering of the average temperature
of the whole surface of the earth at the same time. This
assumption has forced them to look for a cause of glacial
periods only in such possible factors as could operate to cool
the whole surface of the earth at once. It has also compelled
them to maintain the view that glacial periods have always
been simultaneous in the Northern and Southern Hemi-
spheres.
It is remarkable that this assumption has been maintained
over a long period of time despite the fact that it is in sharp