2. "The World before the Deluge," p. 451.]

{p. 31}

And, even in North America, the Drift is not found everywhere. There
is a remarkable region, embracing a large area in Wisconsin, Iowa,
and Minnesota, which Professor J. D. Whitney[1] calls "the driftless
region," in which no drift, no clays, no gravel, no rock strive or
furrows are found. The rock-surfaces have not been ground down and
polished. "This is the more remarkable," says Geikie, "seeing that
the regions to the north, west, east, and south are all more or less
deeply covered with drift-deposits."[2] And, in this region, as in
Siberia, the remains of the large, extinct mammalia are found
imbedded in the surface-wash, or in cracks or crevices of the
limestone.

If the Drift of North America was due to the ice-sheet, why is there
no drift-deposit in "the driftless region" of the Northwestern States
of America? Surely this region must have been as cold as Illinois,
Ohio, etc. It is now the coldest part of the Union. Why should the
ice have left this oasis, and refused to form on it? Or why, if it
did form on it, did it refuse to tear up the rock-surfaces and form
Drift?

Again, no traces of northern drift are found in California, which is
surrounded by high mountains, in some of which fragments of glaciers
are found even to this day.[3]

According to Foster, the Drift did not extend to Oregon; and, in the