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Signatures of Late Quaternary sea-level changes and Neo-tectonic activity over Visakhapatnam - Gopalpur shelf, east coast of India

DRS at CSIR-National Institute of Oceanography

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Title Signatures of Late Quaternary sea-level changes and Neo-tectonic activity over Visakhapatnam - Gopalpur shelf, east coast of India
 
Creator Rao, K.M.
Reddy, N.P.C.
PremKumar, M.K.
Raju, Y.S.N.
Venkateswarlu, K.
Murthy, K.S.R.
 
Subject sea level changes
tectonics
coastal morphology
stratigraphy
quaternary
 
Description High-resolution shallow seismic and echo sounding profiles of the continental shelf between Visakhapatnam and Gopalpur reveal prominent morphological features like terraces, reefs and pinnacles at different water depths of 80-100 m, 50-30 m representing still stands during the late Pleistocene to Holocene. Seismic records obtained off Visakhapatnam-Pudimadaka show two distinct sedimentary units bounded by erosional unconformities. Occurrence of palaeo-channel beneath the seabed in the inner shelf and progradational deltaic sequence over the erosional paleo-shelf (lower unconformity) at the shelfedge off Pudimadaka indicate active sedimentation at the form of outershelf during Pre-Holocene. High-resolution echograms indicate diversity of reef configuration in the form of single, double/multi peaked and domal shaped reef system reflecting variable energy conditions during low stands. Occurrence of about 10 m vertical fall of the seabed off Gopalpur and significant faulting in the underlying sequences off Bhimunipatnam and Pudimadaka suggest a possible neo-tectonic activity.
 
Date 2009-01-07T10:28:49Z
2009-01-07T10:28:49Z
2001
 
Type Conference Article
 
Identifier Proceedings of the International Seminar on Quaternary Sea-Level Variation, Shoreline Displacement and Coastal Environment, Ed by: Rajamanickam, G.V.; Tooley, M.J. 116-124p.
http://drs.nio.org/drs/handle/2264/1546
 
Language en
 
Rights Copyright [2001]. All efforts have been made to respect the copyright to the best of our knowledge. Inadvertent omissions, if brought to our notice, stand for correction and withdrawal of document from this repository.
 
Publisher New Academic Publishers, Delhi