Man and the Glacial PeriodWright, G. Frederick (George Frederick)
History
Man and the Glacial Period
Wright, G. Frederick (George Frederick)
Glacial epoch; Prehistoric peoples
It is in New England, also, that kames are to be found in better
development than anywhere else in America. These interesting remnants of
the Glacial age are clearly described by Mr. James Geikie. His account
will serve as well for New England as for Scotland.
The sands and gravels have a tendency to shape themselves into mounds
and winding ridges, which give a hummocky and rapidly undulating outline
to the ground. Indeed, so characteristic is this appearance, that by it
alone we are often able to mark out the boundaries of the deposits with
as much precision as we could were all the vegetation and soil stripped
away and the various subsoils laid bare. Occasionally, ridges may be
tracked continuously for several miles, running like great artificial
ramparts across the country. These vary in breadth and height, some of
the more conspicuous ones being upward of four or five hundred feet
broad at the base, and sloping upward at an angle of twenty-five or even
thirty-five degrees, to a height of sixty feet and more above the general
surface of the ground. It is most common, however, to find mounds and
ridges confusedly intermingled, crossing and recrossing each other at all
angles, so as to enclose deep hollows and pits between. Seen from some
dominant point, such an assemblage of kames, as they are called, looks
like a tumbled sea--the ground now swelling into long undulations, now
rising suddenly into beautiful peaks and cones, and anon curving up in
sharp ridges that often wheel suddenly round so as to enclose a lakelet
of bright clear water.[AZ]
[Footnote AZ: The Great Ice Age, pp. 210, 211.]
[Illustration: Fig. 29.--Section of kame near Dover, New Hampshire.
Length, three hundred feet; height, forty feet; base, about forty feet
above the Cocheco River, or seventy-five feet above the sea. _a_, _a_,
gray clay; _b_, fine sand; _c_, _c_, coarse gravel containing pebbles
from six inches to one foot and a half in diameter; _d_, _d_, fine gravel
(Upham).]
[Illustration: Fig. 30.--Kames in Andover Mass.]
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