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Author: William a Szary Publisher: ISBN: Category : Languages : en Pages : 124
Book Description
The Catksill Delta consists of many lobes shed from the rising Acadia Mountains during the Devonian Period. The delta is composed of a combination of marine and non-marine sediments that accumulated along the shoreline of the Kaskaskia Sea. The book attempts to draw together the sedimentary processes which shaped the delta along the western Acadia Mountain.Chapter 1 summarizes the Acadian Orogeny, its paleogeography including the Avalonian terranes. It provides a review of orogenic events, collisions, tectophases, the Acadian foreland basin, delta complex, and a brief discussion of the Kaskaskia Sea. Chapter 2 begins the discussion of the Catskill Delta Complex, addressing the paleo-continental setting, reconstruction, and summarizes paleo-magnetic tectonic models. Chapter 3 presents the Catskill deltaic clastic deposition including the Catskill Formation, paleogeography, paleo-cllimate, and sedimentary processes. Chapter 4 presents the Catskill delta basin facies development controls including its paleogeography, paleo-climate, tectonic regime, origin of black basinal facies, and three phases belonging to a proposed climate model. Chapter 5 addresses the shallow marine and non-marine strata. Chapter 6 discusses unusual marginal marine lithofacies. Chapter 7 summarizes the quantitative interpretation of ancient river systems in the Oneonta Formation of the Catskill megafacies. The book ends with Chapter 8 discussing the Upper Devonian turbidite sequence of central and southern Appalachian Basin and contrasts it with submarine fan deposits.
Author: John W. Cosgrove Publisher: Geological Society of London ISBN: 9781862391659 Category : Science Languages : en Pages : 340
Book Description
This volume is a state of the art look at our understanding of joint development in the crust. Answers are provided for such questions as the mechanisms by which joints are initiated, the factors controlling the path they follow during the propagation process, and the processes responsible for the arrest of joints. Many of the answers to these questions can be inferred from the geometry of joint surface morphology and joint patterns. Joints are a record of the orientation of stress at the time of propagation and as such they are also useful records of ancient stress fields, regional and local. Because outcrop and subsurface views of joints are limited, statistical techniques are required to characterize joints and joint sets. Finally, joints are subject to post-propagation stresses that further localize deformation and are the focus for the development of new structures.