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...
General
Is the information for this product incomplete, wrong or inappropriate?
Let us know about it.
Does this product have an incorrect or missing image?
Send us a new image.
Is this product missing categories?
Add more categories.
Review This Product
No reviews yet - be the first to create one!
Welcome to Loot.co.za!
Sign in / Register |Wishlists & Gift Vouchers |Help | Advanced search
