Interpretation of Seismic Reflection Data from the Northern San Luis Valley, South-Central Colorado

  1. Robert E. Riecker
  1. Thomas L. Davis1 and
  2. Dean Stoughton2

Published Online: 21 MAR 2013

DOI: 10.1029/SP014p0185

Rio Grande Rift: Tectonics and Magmatism

Rio Grande Rift: Tectonics and Magmatism

How to Cite

Davis, T. L. and Stoughton, D. (1979) Interpretation of Seismic Reflection Data from the Northern San Luis Valley, South-Central Colorado, in Rio Grande Rift: Tectonics and Magmatism (ed R. E. Riecker), American Geophysical Union, Washington, D. C.. doi: 10.1029/SP014p0185

Author Information

  1. 1

    Department of Geology, University of Calgary, Calgary, Alberta T2N 1N4

  2. 2

    Amoco Production Co., Security Life Building, Denver, Colorado 80202

Publication History

  1. Published Online: 21 MAR 2013
  2. Published Print: 1 JAN 1979

ISBN Information

Print ISBN: 9780875902142

Online ISBN: 9781118664988

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Keywords:

  • Interpretation;
  • Phanerozoic geologic time;
  • San Luis Valley;
  • Seismic reflection data;
  • Surface geologic expression;
  • Tectonic elements

Summary

Interpretation of 50 km of reflection seismic data acquired by the Colorado School of Mines in the northern San Luis Valley, Colorado illustrates the tectonic style of the northern extension of the Rio Grande Rift system. Departure from the geologic norm for a simple rift system exists in this area. This departure is exhibited in the angle of fault planes, fault throw, asymmetry of graben development and many other features. Reasons for the San Luis Valley departing the simple rift valley condition involves the role of younger Cenozoic tectonic overprinting of older fault systems. Many of the faults formed during Permo-Pennsylvanian and/or Laramide time were reactivated during Cenozoic time. Fault styles, attitudes, and displacements during Cenozoic rifting were thus controlled by older fault systems not directly involved in rift tectonics. Documentation of fault movement through geologic time and the role of tectonic variations in structural style as controlling factors on deposition and stratigraphic systems is essential in development of an integrated geologic model of the Rio Grande Rift.