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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/6023
Title: Significance of seismites in the Late Cretaceous transgressive Nimar Sandstone succession, Son-Narmada rift valley, Central India
Authors: Jha S.
Bhattacharya, Biplab
Nandwani S.
Published in: Geological Journal
Abstract: Detailed facies architecture study of the Late Cretaceous (Cenomanian) Nimar Sandstone (Bagh Group), from Son-Narmada rift valley, Central India, reveals deposition in a fluvial–marine environment. The lower part of the Nimar Sandstone succession depicts deposition in predominantly fluvial setting, whereas the middle–upper part of the succession manifests sedimentation under a tide-dominated estuarine to a tide–wave influenced shoreface environment. Retrogradational nature of the successions in the upper part and lateral facies change from west to east signifies an eastwardly decreasing marine influence. This attests to a sustained event of marine transgression from the west affecting the Son-Narmada rift valley during the Late Cretaceous time. Beds with various soft-sediment deformation structures (SSDS), viz., convolute laminae, load and flame structures, pseudonodules, contorted beddings, syn-sedimentary faults, and sand/silt dykes, occur in distinct stratigraphic levels within the middle part of the succession. These beds are separated by thick successions of undeformed beds. This paper reports these beds as seismites for the first time from the Son-Narmada rift valley. The seismites signify instantaneous liquefaction and fluidization of unconsolidated sediments triggered by passage of repetitive earthquake shock waves during sedimentation in fault-bound rift basin. These seismites are important as they mark a new phase of reactivation of the Son-Narmada South Fault within the Son-Narmada rift valley during the Cenomanian time. This reactivation of the Son-Narmada South Fault led to basinal subsidence under prevalent extensional tectonism, which controlled the sedimentation during the Late Cretaceous time. Copyright © 2016 John Wiley & Sons, Ltd. Copyright © 2016 John Wiley & Sons, Ltd.
Citation: Geological Journal (2017), 52(5): 768-783
URI: https://doi.org/10.1002/gj.2839
http://repository.iitr.ac.in/handle/123456789/6023
Issue Date: 2017
Publisher: John Wiley and Sons Ltd
Keywords: basin subsidence
Cenomanian
earthquakes
fault reactivation
Son-Narmada rift valley
transgression
ISSN: 721050
Author Scopus IDs: 56382708700
8627465800
57212209691
Author Affiliations: Jha, S., Department of Earth Sciences, Indian Institute of Technology, Roorkee, India
Bhattacharya, B., Department of Earth Sciences, Indian Institute of Technology, Roorkee, India
Nandwani, S., Department of Earth Sciences, Indian Institute of Technology, Roorkee, India
Funding Details: Authors gratefully acknowledge the introductory discussions on the study area with Dr. Tapas Kumar Gangopadhyay (IIEST Shibpur, W.B.) and Mr. Vishal Verma (Manawar, M.P.). Authors are thankful to Mr. Sudhir Sharma, Mr. Pawan Kumar and Mr. Tarun Kapoor for their sincere assistances during fieldwork. Authors are thankful to the anonymous reviewers for constructive comments and the Editor, Sarbani Patranabis-Deb for kind support. Authors acknowledge the financial and infrastructural facilities received from the Indian Institute of Technology, Roorkee.
Corresponding Author: Bhattacharya, B.; Department of Earth Sciences, Indian Institute of TechnologyIndia; email: bbgeofes@iitr.ac.in
Appears in Collections:Journal Publications [ES]

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