Abstract
The northern margin of the Indian plate bears a sequence of Tethyan sediments of platform facies ranging in age from Vendian to Cretaceous punctuated by a series of breaks in sedimentation. There are about five transgressive-regressive cycles until the Tethys got eventually closed after the end of Cretaceous. The Palaeozoic stratigraphy was somewhat confused due to the mis-reporting of fauna supposedly of late Silurian and Devonian ages. This has been cleared now and it is seen that there are two major breaks in Palaeozoic viz, Late Cambrian—Early Ordovician and Late Silurian-Devonian. The Mesozoic sequence represents deposition on a passive continental margin with slow subsidence. The pattern was, however, entirely different along the northern boundary close to the Indus-Tsangpo Suture where an arc-trench system developed in Mesozoic times resulting in the deposition of wildflysch and generation of island arc volcanism.
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