The Mahsuri Rings in Langkawi

Tjia, H. D. (2010) The Mahsuri Rings in Langkawi. In: Geological heritage of Malaysia: geoheritage conservation (1997-2009). Institut Alam Sekitar dan Pembangunan (LESTARI), Universiti Kebangsaan Malaysia, Bangi, Selangor, pp. 309-320. ISBN 9789675227370

An east-west elongated elliptical ridge structure on Langkawi main island is clearly visible on satellite imagery. A closer inspection and a gravity survey reveal two partially superimposed ring structures, each 2.4 km across and whose centres in 280° -110° are 600 metres apart. The partial superposition indicates the eastern ring to have formed early, but it is further interpreted that both developed almost simultaneously by impacting extraterrestrial projectiles some 10 million years ago. The structures are henceforth referred to as Mahsuri Rings. The regional north- northeasterly strikes of the Singa Formation shows disturbance in the vicinity of the rings, and may represent the influence of impact. The most convincing evidences of shock metamorphism are planar deformation features in vein quartz that form dykes and sills in the Singa Formation at Sungai Batu Asah, 2 km east of the eastern Mahsuri Ring. Extinction mosaicism also exist in the quartz.

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Abstract

An east-west elongated elliptical ridge structure on Langkawi main island is clearly visible on satellite imagery. A closer inspection and a gravity survey reveal two partially superimposed ring structures, each 2.4 km across and whose centres in 280° -110° are 600 metres apart. The partial superposition indicates the eastern ring to have formed early, but it is further interpreted that both developed almost simultaneously by impacting extraterrestrial projectiles some 10 million years ago. The structures are henceforth referred to as Mahsuri Rings. The regional north- northeasterly strikes of the Singa Formation shows disturbance in the vicinity of the rings, and may represent the influence of impact. The most convincing evidences of shock metamorphism are planar deformation features in vein quartz that form dykes and sills in the Singa Formation at Sungai Batu Asah, 2 km east of the eastern Mahsuri Ring. Extinction mosaicism also exist in the quartz.

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Item Type:	Book Section
Additional Information:	Available at Perpustakaan Sultan Abdul Samad, Universiti Putra Malaysia, 43000 UPM Serdang, Malaysia. QE299.5 G345 Call Number
AGROVOC Term:	natural resources
AGROVOC Term:	cultural heritage
AGROVOC Term:	cultural development
AGROVOC Term:	documentation
AGROVOC Term:	geologists
AGROVOC Term:	government agencies
AGROVOC Term:	sustainable development
AGROVOC Term:	economic development
AGROVOC Term:	tourism
Geographical Term:	Malaysia
Depositing User:	Ms. Azariah Hashim
Date Deposited:	04 Feb 2025 06:45
Last Modified:	04 Feb 2025 06:45
URI:	http://webagris.upm.edu.my/id/eprint/1038

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