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Central Appalachian Periglacial Geomorphology
Geomorphology of the Central Appalachians
Author: Douglas Wilson Johnson
Publisher:
Published: 1932
Total Pages: 338
ISBN-13:
DOWNLOAD EBOOK →Periglacial Geomorphology
Author: Athol D. Abrahams
Publisher: Routledge
Published: 2020-05-10
Total Pages: 324
ISBN-13: 1000045900
DOWNLOAD EBOOK →This book, first published in 1992, contains the proceedings of the 22nd Binghamton Geomorphology Symposium, and highlights the quantity and diversity of periglacial geomorphic research being undertaken in Arctic and alpine environments. The articles explore a variety of geomorphic processes and examine the potential impacts of global change on the nature and extent of permafrost and seasonal ice phenomena.
Appalachian Geomorphology
Author: Thomas William Gardner
Publisher: Elsevier Publishing Company
Published: 1989
Total Pages: 336
ISBN-13:
DOWNLOAD EBOOK →In 1889 William Morris Davis offered in his paper The Rivers and Valleys of Pennsylvania'' an elegant set of arguments for the origin of the ridges and gaps, and went on to propose a model for the drainage development and geomorphic evolution of the Appalachians. His work served to focus the geomorphic community into an intense, extended debate on the nature and fundamental controls of the long-term erosion of the Appalachians. The 100th anniversary of Davis' provocative paper prompted the convening of a symposium to address some of the fundamental questions about the Appalachians, the 1989 Geomorphology Symposium. The theme of this symposium was the geomorphic evolution of the Appalachians. This volume brings together a collection of papers from the symposium, to provide a summary of the current state of knowledge.
Periglacial Geomorphology
Author: Colin K. Ballantyne
Publisher: John Wiley & Sons
Published: 2018-01-16
Total Pages: 496
ISBN-13: 1405100060
DOWNLOAD EBOOK →Efficacy of Pleistocene Periglacial Weathering in the Central Appalachians
Geomorphology of the Central Appalachians (Classic Reprint)
Author: Douglas Johnson
Publisher: Forgotten Books
Published: 2018-09-22
Total Pages: 72
ISBN-13: 9781396339226
DOWNLOAD EBOOK →Excerpt from Geomorphology of the Central Appalachians The number, origin, age, and correlation of peneplains Within the area traversed present a problem concerning Which there is still much difference of opinion. Although a larger number of erosion levels may be represented, the evolution and topography of the Appalachian region will be described With reference to the five most prominent peneplains and to altitudes above and below them. These peneplains, named in the order Of their age, are the pre-triassic, the Fall Zone (jura-cretaceous), the Schooley (tertiary), the Harrisburg (probably late Tertiary), and the Somerville (possibly Pleistocene). The authors hope that this guidebook Will be regarded, not as a statement of facts to be accepted Without question, but merely as a guide to field dis eussions of problems encountered on the journey. 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.
Periglacial Geomorphology
Appalachian Pasts, Arctic Futures
Author: Joanmarie Del Vecchio
Publisher:
Published: 2021
Total Pages:
ISBN-13:
DOWNLOAD EBOOK →Understanding climate controls on topography and erosion rates reveal the underlying mechanisms operating on the landscape, allowing us to predict landscape response to climate perturbations. The onset of Quaternary glaciations represents a large climate perturbation to the Earth system, though a comparable climate shift is occurring today. Adjacent to continental ice sheets were cold but unglaciated landscapes underlain by permafrost, or perennially frozen soils. These periglacial landscapes would be particularly sensitive to warming: climate modulates soil erodibility, hydrology, and vegetation, such that erodibility varies not only in space but time on seasonal and millennial timescales. The unique combination of hillslope and fluvial processes of permafrost landscapes imply that there could be an erosional and topographic "signature" of permafrost processes compared to temperate climates. In this dissertation I explore whether and how the shape of the hillslopes and channels, as well as long-term erosion rates, are adjusted to periglacial conditions compared to temperate climates. I focus on the central Appalachian Mountains, which, like other mid-latitude settings, was underlain by permafrost during previous glacial periods, yet the relative magnitude of erosion during warm and cold climates, as well as in transition periods, remains unquantified. I generate a high-resolution climate and erosion record of a single warming phase to determine how specific climate factors affect hillslope erosion mechanisms. I pair these results with a Quaternary erosion record to show that periglacial conditions promote efficient hillslope erosion compared to temperate conditions. I then demonstrate that the permafrost-mediated hillslope and channel erosion dynamics inferred from sedimentary archives is also borne out in hillslope-channel form on paleoclimate gradients in central Appalachia. This thesis isolates the mechanisms through which periglaciation affects erosion rates and processes and quantifies the role past climates have played in Appalachia's modern geomorphology. I also show that these principles can be used to identify erosion signatures of ongoing warming in Arctic landscapes.
