Slumping in the Upper Jurassic Baisakhi Formation of the Jaisalmer Basin, western India: Sign of synsedimentary tectonics?
Matthias Albertia, b,, Dhirendra K. Pandey c, Jitendra K. Sharma b, Narendra K. Swami b, Alfred Uchman d
aInstitut für Geowissenschaften, Christian-Albrechts-Universität zu Kiel, Ludewig-Meyn-Straße10, 24118Kiel, Germany;bDepartment of Geology, University of Rajasthan, Jaipur302004, India;;cEarth & Planetary Sciences Group/Palaeontology, Manipal Center for Natural Sciences, Manipal University, Manipal576104, India;dInstitute of Geological Sciences, Jagiellonian University, Oleandry2a, 30-063Kraków, Poland
Abstract A spectacularly exposed slump is described from a 120-m-long road cut between the villages of Kanod and Deva in the northeastern Jaisalmer Basin of Rajasthan, India. The Upper Jurassic part of the sediments at the outcrop was formed in a near-shore setting and belongs to the Ludharwa Member of the Baisakhi Formation. The 3-m-thick unit shows a number of asymmetric folds and thrust faults leading to an imbrication of partly lithified sandstone beds. The deformation structures allow the reconstruction of a movement towards the northwest. This agrees well with the basin configuration that shows a deepening into this direction. Although the determination of a specific trigger mechanism is difficult for soft-sediment deformation structures, an earthquake caused by synsedimentary tectonics in the basin seems to be the most likely explanation.
Fund:This work was supported by the Alexander von Humboldt Foundation, Germany [Matthias Alberti], the Department of Science and Technology, India [Dhirendra K. Pandey], and the Jagiellonian University, Poland [Alfred Uchman]. The authors thank the journal editors and reviewers for their constructive criticism.
Matthias Alberti,Dhirendra K. Pandey,Jitendra K. Sharma et al. Slumping in the Upper Jurassic Baisakhi Formation of the Jaisalmer Basin, western India: Sign of synsedimentary tectonics?[J]. , 2017, 6(4): 321-332.
Matthias Alberti,Dhirendra K. Pandey,Jitendra K. Sharma et al. Slumping in the Upper Jurassic Baisakhi Formation of the Jaisalmer Basin, western India: Sign of synsedimentary tectonics?[J]. Journal of Palaeogeography, 2017, 6(4): 321-332.
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