This is a reproduction of a book published before 1923. This book may have occasional imperfections such as missing or blurred pages, poor pictures, errant marks, etc. that were either part of the original artifact, or were introduced by the scanning process. We believe this work is culturally important, and despite the imperfections, have elected to bring it back into print as part of our continuing commitment to the preservation of printed works worldwide. We appreciate your understanding of the imperfections in the preservation process, and hope you enjoy this valuable book. ++++ The below data was compiled from various identification fields in the bibliographic record of this title. This data is provided as an additional tool in helping to ensure edition identification: ++++ The Upper Devonian Delta Of The Appalachian Geosyncline... Joseph Barrell Yale university, Geological department, 1914 Geology, Stratigraphic

Authors Also Include Richard Swann Lull, Ellsworth Huntington.

This scarce antiquarian book is a selection from Kessinger Publishing's Legacy Reprint Series. Due to its age, it may contain imperfections such as marks, notations, marginalia and flawed pages. Because we believe this work is culturally important, we have made it available as part of our commitment to protecting, preserving, and promoting the world's literature. Kessinger Publishing is the place to find hundreds of thousands of rare and hard-to-find books with something of interest for everyone

This scarce antiquarian book is a selection from Kessinger Publishing's Legacy Reprint Series. Due to its age, it may contain imperfections such as marks, notations, marginalia and flawed pages. Because we believe this work is culturally important, we have made it available as part of our commitment to protecting, preserving, and promoting the world's literature. Kessinger Publishing is the place to find hundreds of thousands of rare and hard-to-find books with something of interest for everyone

Purchase of this book includes free trial access to www.million-books.com where you can read more than a million books for free. This is an OCR edition with typos. Excerpt from book: J. Barrcll? Upper Devonian Delta. 87 Art. VII. ? The Upper Devonian Delta of the Appalachian Geosyncline; by Joseph Barbell. Part II. Factors Controlling The Present Limits Of The Strata. Conteitts. Introduction and summary 87 Present extent and thickness of the Upper Devonian 88 Comparison of this restoration with other maps . 91 Influence of erosion cycles 98 Present limits dependent upon intervening baselevels.. 93 Relation of post-Ordovician erosion to original limitsxjf Devonian 95 Influence of late Paleozoic cycles of erosion 96 Degree of destruction by the pre-Newark cycle 97 The Newark erosion cycle and the qnartzite conglom-. erates 99 The Jurassic erosion cycle 1(12 The post-Jurassic erosion cycles 103 Absence of structural relations between present and orig- inal limits 105 Introduction And Summary. Toward the west and southwest the Upper Devonian delta faced the sea. The study of its strata, guided by criteria for distinguishing the modes of origin of the several formations, has led in the first part to certain conclusions. But facing the east the marginal outcrop is near the region of maximum thickness. The beveled edges of the strata, measured in thousands of feet, bear witness to a former extension toward the ancient land of Appalachia. The nature of the surface and the relations of the delta to the sea are but one half of the problem. The former extent and nature of the strata now destroyed and the relations of the delta to the old-land constitute the other half. Although Appalachia and its marginal waste plains no longer exist, we may attack these questions by inferences from the nature of the remaining strata, from the structure of the rocks beyond, and by the evidences as to the amounts of erosion whic...

Authors Also Include Richard Swann Lull, Ellsworth Huntington.