Continental Evolution by Lithospheric Shingling

  1. Muawia Barazangi and
  2. Larry Brown
  1. Frederick A. Cook

Published Online: 15 MAR 2013

DOI: 10.1029/GD014p0013

Reflection Seismology: The Continental Crust

Reflection Seismology: The Continental Crust

How to Cite

Cook, F. A. (1986) Continental Evolution by Lithospheric Shingling, in Reflection Seismology: The Continental Crust (eds M. Barazangi and L. Brown), American Geophysical Union, Washington, D. C.. doi: 10.1029/GD014p0013

Author Information

  1. Department of Geology and Geophysics, University of Calgary, Calgary, Alberta, Canada T2N 1N4

Publication History

  1. Published Online: 15 MAR 2013
  2. Published Print: 1 JAN 1986

Book Series:

  1. Geodynamics Series

ISBN Information

Print ISBN: 9780875905143

Online ISBN: 9781118670118

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Keywords:

  • Earth—Crust—Congresses;
  • Continents—Congresses;
  • Seismic reflection method—Congresses

Summary

Crustal geometries observed on seismic reflection data indicate that the boundaries of terranes accreted to the margins of continental cratons often have a low dip angle (30° or less). Where terranes have encroached upon a subducted passive margin, the boundaries are typically listric into upper or mid-crustal detachments and rarely, if ever, penetrate the entire crust. Outboard of the subducted margin, terrane boundaries may penetrate the lower crust and upper mantle. Examples of the former type include the west margin of the Bronson Hill arc in New England, the Rheno-Hercynian zone in France and the Piedmont Carolina slate belt in the southern Appalachians. Examples of the latter type may include the Brunswick terrane in the southern Appalachians and the Gander terrane in the northern Appalachians. Such observations suggest a model in which the areal extent of continental cratons is increased in collisional orogens by a process of lithospheric “shingling”.