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Book Chapter

Geological framework of the Andaman–Nicobar Islands

By
P. C. Bandopadhyay
P. C. Bandopadhyay
1
Present Address: Department of Geology, University of Calcutta, Kolkata-700019, India
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;
A. Carter
A. Carter
2
Department of Earth & Planetary Sciences, Birkbeck, University of London, London UK
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Published:
January 01, 2017

Abstract

The Andaman–Nicobar archipelago that forms the western margin of the Andaman Sea is a sediment-dominated accretionary wedge (outer-arc island) associated with a convergent margin tectonic setting. The Andaman accretionary ridge consists of two stratigraphically and structurally distinct terranes, juxtaposed and telescoped into a north–south-trending high-relief fold-thrust belt formed along the obliquely subducting eastern margin of the Indo-Australian oceanic lithospheric plate. The geology and structure of the ridge reflect the complexity of the evolving tectonics and stratigraphy of an accretionary wedge. Pre-Cretaceous meta-sedimentary rocks, Upper Cretaceous ophiolites and Palaeogene–Neogene sedimentary formations indicate rapid, spatial and temporal changes in lithology, sedimentology, sedimentary and tectonic environments, and palaeogeographic setting. This chapter outlines the current geodynamic setting, evidence for the history of accretion and regional geology and introduces the regional stratigraphic framework.

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Geological Society, London, Memoirs

The Andaman–Nicobar Accretionary Ridge: Geology, Tectonics and Hazards

P. C. Bandopadhyay
P. C. Bandopadhyay
University of Calcutta, India
Search for other works by this author on:
;
A. Carter
A. Carter
Birkbeck University of London, UK
Search for other works by this author on:
Geological Society of London
Volume
47
ISBN electronic:
9781786203007
Publication date:
January 01, 2017

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