By Nicholas B. Woodward
About The Product
Published by means of the yankee Geophysical Union as a part of the Short classes in Geology Series.
The first version of those brief direction notes was once ready by means of Woodward and Boyer for the SE part assembly of the Geological Society of the United States held in Knoxville, Tennessee, March 1985, and released as Dept. of Geol. Sci. stories in Geology, v. eleven. The Structural Geology and Tectonics department of the GSA as a result invited Woodward, Boyer and Suppe to offer a day brief direction on the nationwide Geological Society of the USA assembly in Orlando, Florida, November 1985 (v. eleven, 2d edition). we're super happy so one can perform the overseas Geological Congress and feature thoroughly revised the current path notes.
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Extra info for Balanced Geological Cross-Sections: An Essential Technique in Geological Research and Exploration
A NORMAL SEQUENCE OF b IMBRICATION RESULTS OF I M B R I C A T I O N I N THE FOOTWALL Fig. 7-1. Dahlstrom's leading edge and trailing edge sequences of imbrication. If imbricates develop at depth they should break forward, and tLen are passively carried up towards the surface. If imbricates develop near the surface he suggested that they break-back in the hangingwall (a) and forward in the footwall (b), [from Dahlstrom, 19701. Seauence o f Thrustiqg We are interested in sequence of thrusting for a number of reasons.
6-4c). When displacement and spacing on the individual imbricates is equal, an antiformal stack is produced (Fig. 6-4e), and when displacement is approximately twice the spacing a flat-roofed "foreland-dipping duplex" results (Fig. 6-4f,g). Should the displacement on an imbricate be less than half the spacing, a "bumpy-" or corrugated-roof duplex will be produced. A displacement which is considerably less than the spacing of the imbricates creates isolated ramp anticlines, which in a strict sense of Boyer and Elliott's term is still a duplex, since the imbricates diverge from a single floor thrust and merge into a single roof.
A) Douglas [I9501 recognized that both the Livingstone thrust and its HW and FW beds were folded together; (b) Geologic section with ramps and flats in both the HW and EW; (c) Douglas also connected the shape of the FW stairsteps with the HW stair-steps to give a reconstructed trajectory for the entire thrust sheet from the Devonian to the Cretaceous [from Douglas, 1950, Gap Map Area]. 24 BALANCED GEOLOGICAL CROSS S E C T I O N S Session 2 3D Thrust Geometry Wilson and Stearns' [I9581 analysis of the Cumberland Overthrust in Tennessee recognized not only the cross-sectional thrust shapes, but also their three-dimensional shape (Fig.
Balanced Geological Cross-Sections: An Essential Technique in Geological Research and Exploration by Nicholas B. Woodward