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The AAPG/Datapages Combined Publications Database

AAPG Special Volumes

Abstract


Pub. Id: A110 (1982)

First Page: 167

Last Page: 191

Book Title: M 34: Studies in Continental Margin Geology

Article/Chapter: Structural Framework and the Evolutionary History of the Continental Margin of Western India: Rifted Margins: Field Investigations of Margin Structure and Stratigraphy

Subject Group: Geologic History and Areal Geology

Spec. Pub. Type: Memoir

Pub. Year: 1982

Author(s): Bhoopal R. Naini (*), Manik Talwani

Abstract:

Sediment and upper crustal structure derived from sonobuoys, together with other geophysical evidence, divides the continental margin of western India into two provinces: the western basin and the eastern basin. The western basin exhibits well-developed sea-floor spreading type magnetic anomalies, whereas the eastern basin has no significant correlatable anomalies. The two basins are divided by the Chagos-Laccadive and the Laxmi ridges. The Laxmi ridge has a velocity structure similar to that of the eastern basin; however, the total crustal thickness of the ridge (more than 20 km) is much greater than that of the eastern basin. We propose that the western margin of India has a two phase evolutionary history: a phase of rifting followed by a phase of sea-floor spre ding in early Tertiary time.

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