Outcrop-based sequence stratigraphic studies on GTM with focus on the kachchh mesozoic

Abstract

The history of the relatively new interdisciplinary and highly applicative discipline of sequence stratigraphy is summarized. Basics, terminology used in the present work, as also author’s approach to outcrop-based studies in the Kachchh basin are briefly outlined. The five mega-sequence framework in the Indian Phanerozoic is introduced with focus on the fourth one of intra-Permian–intra-Paleogene span from the origin to the closure of the Neotethys. The said mega-sequence is differentiated into 3 first-order sequences in the Indian record, and 37 second-order sequences in Spiti, Kachchh and Cauvery. The Kachchh record is further exampled with third-, fourth- and fifth-order differentiation. The SBs and MFs are précised at ~400/200 ky subzonal/horizonal resolution or its multiples. The chapter concludes with crude investigation of the sequence periodicity at different orders in which the second-order sequences are found to correspond with cyclicity of ~400 ky or its multiples (Tables 3.1, 3.2 and 3.3). © Springer Science+Business Media Singapore 2017.