TRAVELING SAND HILLS ON LAKE ONTARIO.

An interesting example of sand-drift occurs near Wellington Bay, on Lake

Ontario, ten miles from Pictou. The lake shore near the sand banks is

indented with a succession of rock-paved bays, whose gradually shoaling

margins afford rare bathing grounds. East and West Lakes, each five

miles long, and the latter dotted with islands, are separated from

Lake Ontario by narrow strips of beach. Over the two mile-wide isthmus

separating the little lakes, the sand banks, whose glistening heights

are visible miles away, are approached. On near approach they are hidden

by the cedar woods, till the roadway in front is barred by the advancing

bank, to avoid which a roadway through the woods has been constructed

up to the eastern end of the sand range. The sand banks stretch like a

crescent along the shore, the concave side turned to the lake, along

which it leaves a pebbly beach. The length of the crescent is over two

miles, the width 600 to 3,000 or 4,000 feet.

Clambering up the steep end of the range among trees and grapevines, the

wooded summit is gained, at an elevation of nearly 150 feet. Passing

along the top, the woods soon disappear, and the visitor emerges on a

wild waste of delicately tinted saffron, rising from the slate-colored

beach in gentle undulation, and sleepily falling on the other side down

to green pastures and into the cedar woods. The whole surface of this

gradually undulating mountain desert is ribbed by little wavelets a few

inches apart, but the general aspect is one of perfect smoothness. The

sand is almost as fine as flour, and contains no admixture of dust The

foot sinks only an inch or two in walking over it; children roll about

on it and down its slopes, and, rising, shake themselves till their

clothing loses every trace of sand. Occasionally gusts stream over the

wild waste, raising a dense drift to a height of a foot or two only, and

streaming like a fringe over the steep northern edge. Though the sun is

blazing down on the glistening wilderness there is little sensation of

heat, for the cool lake breeze is ever blowing. On the landward side,

the insidious approach of the devouring sand is well marked. One hundred

and fifty feet below, the foot of this moving mountain is sharply

defined against the vivid green of the pastures, on which the grass

grows luxuriantly to within an inch of the sand wall. The ferns of the

cedar woods almost droop against the sandy slope. The roots of the trees

are bare along the white edge; a foot or two nearer the sand buries the

feet of the cedars: a few yards nearer still the bare trunks disappear;

still nearer only the withered topmast twigs of the submerged forest are

seen, and then far over the tree tops stands the sand range. Perpetual

ice is found under the foot of this steep slope, the sand covering and

consolidating the snows drifted over the hill during the winter months.

There is something awe-inspiring, says the correspondent of the Toronto

Globe, in the slow, quiet, but resistless advance of the mountain front.

Field and forest alike become completely submerged. Ten years ago a

farm-house was swallowed up, not to emerge in light until the huge sand

wave has passed over.

* * * * *

Scientific American Supplement, No. 362, December 9, 1882 · 第 11 / 57 题