Abstract

Gulf of Mannar sub basin comprises of two syn-rift depocenters separated by southward plunging Mandapam-Delft ridge. The western part forms the present day shallow water area of Gulf of Mannar. Integrated sequence startigraphic analysis was carried out on Late Albian to Middle Miocene sedimentary sections using seismics, electro logs, sediment sample analysis, FMI (formation micro imager) study and bio-stratigraphic data. By following sequence stratigraphic principles, sequence boundaries and/or their correlative conformities were identified based on stratal patterns and amplitude variations on seismics and correlating them with corresponding log markers close to those seismic signatures. Biostratigraphic studies aided in age control, identifying paleo bathymetry and recognising hiatuses. Eight major sequence boundaries close to Late Albian, Middle Turonian, Early Maastrichtian (K/T boundary), Early Eocene, Middle Eocene, Late Eocene, Early Oligocene and Middle Miocene ages are identified.