A Chapter From The First Volume Of The Final Report Upon The Geology Of New Hampshire Classic Reprint

Author : C. H. Hitchcock
Publisher : Forgotten Books
ISBN 13 : 9780282581077
Total Pages : 432 pages
Book Rating : 4.5/5 (81 download)

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Download or read book The Geology of New Hampshire written by C. H. Hitchcock and published by Forgotten Books. This book was released on 2017-06-21 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from The Geology of New Hampshire: A Report Comprising the Results of Explorations Ordered by the Legislature The theory of Mr. Croll, * which supposes that during the long period of great eccentricity glacial and warm inter-glacial epochs succeeded each other in cycles of years, does not seem to be sustained so fully as we should expect by evidence of such warm intervals, which he thinks even in arctic latitudes would be nearly free from ice and snow. A consideration of what we have to explain by the agency of ice, and of the mode in which these results are likely to have been produced, seems to point to a very long, continuous period of glacial action, with times of retreat and advance, but not apparently of complete departure and return of a continental ice-sheet. By other writers the glacial climate is be lieved to have been principally caused by a different distribution and elevation of the land, attended with changes in the direction of oceanic currents. Even if a supposed combination of such conditions could be shown to be adequate to produce the ice-sheet, it seems more reasonable to attribute its origin to an astronomical cause, which we know to have existed, with a tendency to bring about these results. AS very intense cold is not required for the accumulation and preservation of snow and ice, may not the continually cool climate, when winter occurred in peri helion during the period of great eccentricity, have kept the ice-sheet which was already formed from being melted? The rare testimony of any retreat and subsequent advance of the ice during the glacial period in America, with the vast results which were accomplished in this time, favor this view. 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.