A proposed super-thick sedimentary basin, Bay of Bengal.
Geophysical Research Letters. 19:565-568., Washington, DC, United States (USA): American Geophysical Union, Washington, DC 10.1029/91gl03134 Abstract
A super-thick ( approximately 22km) sedimentary basin under the northern Bay of Bengal is proposed. The hypothesis is based on data from surface wave dispersion, seismic refraction, S (sub n) attenuation, and geology. We present new high frequency S (sub n) data which indicate a cold upper mantle beneath the Bay of Bengal. We propose that the oceanic crust in this region is in fact nearly normal, and that the sedimentary section is at least 6 km thicker than previously thought, with velocities at the base of the sediments having been increased to near 6.5 km/sec by high pressure metamorphism. Reinterpretation of the refraction data indicate a post India-Asia collision thickness of over 16 km. Copyright 1992 by the American Geophysical Union.