Note 134 — Chapter IV

"The shores of Lake Erie, though flat, are elevated about 400 feet above those of Lake Ontario. The descent takes place in the short interval between the two lakes traversed by the Niagara Channel. This descent is partly gradual, producing only a succession of rapids. It is at Queenston, about seven miles below the present site of the Falls, that a range of hills marks the descent to the Ontario level. Volney conceives it certain that this must have been the place down which the river originally fell, and that the continued and violent action of its waves must have gradually worn away the rocks beneath them, and in the course of ages carried the Fall back to its present position, from which it continues gradually receding. Mr. Howison confirms the statement, that, in the memory of persons now living in Upper Canada, a considerable change has been observed. The whole course of the river downward to Queenston is through a deep dell, bordered by broken and perpendicular steeps, rudely overhung by trees and shrubs, and the opposite strata of which correspond, affording thus the strongest presumption that it is a channel hewn out by the river itself."—H. Murray's Historical Description of America, vol. ii., p. 466.

"It is now considered that there is clear geological proof that the Fall once existed at Queenston. The 710,000 tons of water which each minute pour over the precipice of the Niagara, are estimated to carry away a foot of the cliff every year; therefore we must suppose a period of 20,000 years occupied in the recession of the cataract to its present site."—Lyell's Geology.