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The Kashmir Basin fault and its influence on fluvial flooding in the Kashmir Basin, NW Himalaya

By
Afroz Shah
Afroz Shah
Physical and Geological Sciences, Universiti Brunei Darussalam, Bander Seri Begawan Be 1410, Brunei
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Published:
May 01, 2016

Out-of-sequence thrust faulting in the Himalaya poses a great challenge to our understanding of the slip distribution on faults, in particular those that are active. The Kashmir Basin in the NW Himalaya is a classic example of out-of-sequence faulting where the geomorphic analysis of tectonic landforms was possible because of a variety of readily available satellite data, including Shuttle Radar Topography, Google Maps, Global Earth, and Global Multi-Resolution Topography. This was augmented with geologic, seismologic, geodetic, and historical earthquake and flood data. The results show the NW extension of the previously mapped SE-dipping Kashmir Basin fault, where newly mapped discontinuous fault traces are freshly broken and back-tilted, and they preserve warped fluvial surfaces in the Quaternary to Holocene succession. The morphology of the basin suggests that it is rising along an active NE-dipping thrust fault. Importantly, two traces of this fault system cut through the course of the Jhelum River, the only river that drains the Kashmir Basin, and movement on the fault has modified its path. Recent movement on the fault potentially caused damming of this river that resulted in flooding of the Kashmir valley during major earthquakes around A.D. 1505 and/or 1886. Such movement likely caused historical drainage reversals, impoundments, and SE tilting, which were previously attributed to some unknown structures under the Pir Panjal Ranges.

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GSA Special Papers

Geoscience for the Public Good and Global Development: Toward a Sustainable Future

Gregory R. Wessel
Gregory R. Wessel
Geology in the Public Interest, P.O. Box 1135, Vashon, Washington 98070, USA
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Jeffrey K. Greenberg
Jeffrey K. Greenberg
Department of Geology and Environmental Science, Wheaton College, Wheaton, Illinois 60187, USA
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Geological Society of America
Volume
520
ISBN print:
9780813725208
Publication date:
May 01, 2016

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