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Excerpt from Niagara Falls: Their Physical Changes, and the Geology and Tropography of the Surrounding Country The cataract of Niagara and the geology of the surrounding country, have been often described; but believing that there are many facts unnoticed, and others which have not had due weight in these considerations, I shall venture a further attempt at illustrating some important points regarding this great finger post in the path of time. I am far from asserting that the problem regarding the recession or the former condition of this great cascade is settled. So many disturbing causes are constantly presenting themselves, that although the great principles may be deemed established, yet it is impossible to calculate accurately the effect of these minor influences. Every fact recorded of the past, the present, or the future condition of this cataract will aid in the calculation of the final result, which, some thousands of years hence, may be made with tolerable accuracy. In the mean time we must content ourselves with observing these facts and laying down land-marks for the guidance of those who may follow us in the attempt to decide the effect of time upon these ancient rocks. A striking feature in the Topography of western New York, is the great difference of elevation between the Lakes Erie and Ontario, when taken in connexion with the generally level or but slightly uneven surface of the country, and where there are no disturbances among the strata. The difference of elevation between the other great lakes is comparatively small, although Superior is situated in a disturbed geological region. The elevation of Lake Erie is three hundred and thirtyfour feet above Lake Ontario, and the greater part of the difference is overcome by Niagara river in the space of one mile at the rapids and falls. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

Szczegóły książki

Kategoria Książki po angielsku Earth sciences, geography, environment, planning Earth sciences Geology & the lithosphere

• Pełny tytuł: Niagara Falls
• Podtytuł: Their Physical Changes, and the Geology and Tropography of the Surrounding Country (Classic Reprint)
• Autor: James Hall
• Język: Angielski
• Oprawa: Miękka
• Liczba stron: 36
• EAN: 9781330519912
• ISBN: 9781330519912
• ID: 09664006
• Wydawca: Forgotten Books
• Waga: 64 g
• Wymiary: 229 × 152 × 2 mm
• Data wydania: 30. June 2015

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