Marine to continental transition in Himalayan foreland

Abstract

Research Article| September 01, 2008 Marine to continental transition in Himalayan foreland M.K. Bera; M.K. Bera 1Department of Geology and Geophysics, Indian Institute of Technology, Kharagpur 721302, India Search for other works by this author on: GSW Google Scholar A. Sarkar; A. Sarkar † 1Department of Geology and Geophysics, Indian Institute of Technology, Kharagpur 721302, India † E-mail: anindya@gg.iitkgp.ernet.in Search for other works by this author on: GSW Google Scholar P.P. Chakraborty; P.P. Chakraborty 2Department of Applied Geology, Indian School of Mines, Dhanbad 826 004, India Search for other works by this author on: GSW Google Scholar R.S. Loyal; R.S. Loyal 3Centre of Advanced Study in Geology, Panjab University, Chandigarh 160014, India Search for other works by this author on: GSW Google Scholar P. Sanyal P. Sanyal 4Department of Geology and Geophysics, Indian Institute of Technology, Kharagpur 721302, India Search for other works by this author on: GSW Google Scholar GSA Bulletin (2008) 120 (9-10): 1214–1232. https://doi.org/10.1130/B26265.1 Article history received: 22 May 2007 rev-recd: 17 Nov 2007 accepted: 07 Dec 2007 first online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share MailTo Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation M.K. Bera, A. Sarkar, P.P. Chakraborty, R.S. Loyal, P. Sanyal; Marine to continental transition in Himalayan foreland. GSA Bulletin 2008;; 120 (9-10): 1214–1232. doi: https://doi.org/10.1130/B26265.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract Mapping, sedimentological studies, and sequence stratigraphic analysis in parts of the Himalayan peripheral foreland basin of northwest India suggest that deposition of basinal turbidites, derived from both the orogenic and ramp sides, took place due to progressive uplift of the basin margin, causing forced regression. The forced regressive wedge of shoreface white sandstone, thus deposited throughout the foreland basin across the regressive surface of marine erosion, cannot be included in the alluvial sediments of Dagshai Formation. Contrary to earlier inferences, the unconformity between the Subathu and Dagshai Formations is found to occur at the top of the white sandstone marked by caliche development or erosion by Dagshai channel sand interpreted as a Type 1 sequence boundary. The reworked fossils in calciturbidite units suggest that the upper limit of the Subathu Formation must be significantly younger than ca. 44 Ma, and the proposition of a synchronous orogen-scale unconformity of >10 m.y. duration and early exhumation of Himalayan rocks should be reassessed. The duration of unconformity between Subathu and Dagshai Formations is interpreted to be ≤3 m.y. The sea-level fall and shoaling of Subathu Sea that was already set in by forced regression received tectonic enhancement only at the beginning of the Dagshai Formation, which resulted a total turnaround from a marine to a continental alluvial system. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.