Soft Sediment Deformation Structures in the Andaman Flysch Group, Andaman Basin: Evidence for Palaeogene Seismic Activity in the Island Arc
DOI:
https://doi.org/10.51835/bsed.2016.35.1.103Abstract
The Andaman Flysch Group is represented by four sedimentary facies: thick sandstone, thin sandstone, heterolith and shale. They were observed in seven outcrops in the Andaman Islands. Soft sediment deformation features like slumps structure/folds, convolute bedding or lamination, load and flame structures, pseudo nodules/ball and pillow structures and dish and pillar structures have been observed with regularity in these facies and independent of facies specifics. The slumps structure/folds, convolute bedding or lamination encased by undeformed beds, sand volcanoes and some load casts/pseudo-nodules shows evidence of being triggered by earthquakes in this convergent margin basin.
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