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Estimating earthquake frequency and patterns in the Puget Lowland

MS 966, PO Box 25046, Denver, Colorado 80225, USA. Published online 25 June 2014;

Other Geosphere articles cover such topics as 1.

  1. Stream and karst piracy
  2. The 4 April 2010 Mayor-Cucapah earthquake, Baja California, Mexico
  3. Snail fossils in the Tertiary Grand Canyon

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Abandonment of Unaweep Canyon (1.4-0.8 Ma), western Colorado: Effects of stream capture and anomalously rapid Pleistocene river incision
Andres Aslan et al., Dept. of Physical and Environmental Sciences, Colorado Mesa University, Grand Junction, Colorado 81501, USA. Published online 13 May 2014; Special series: CRevolution 2: Origin and Evolution of the Colorado River System II.

Unaweep Canyon is the most spectacular example of stream piracy resulting in canyon abandonment in the upper Colorado River system. New age estimates show that canyon abandonment took place between 0.8 and 1.4 million years ago. It is also clear that abandonment was not triggered by regional uplift of the Uncompahgre Plateau. Capture of the ancestral Gunnison River by the ancestral Colorado River produced a wave of river incision

Contact: Kea Giles
Geological Society of America

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Estimating earthquake frequency and patterns in the Puget Lowland
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