Fossil dinoflagellates across Maestrichtian-Danian boundary in Lower Assam, India

K.P. Jain; S.C.D. Sah; R.Y. Singh

doi:10.54991/jop.1973.918

Authors

K.P. Jain Birbal Sahni Institute of Palaeobotany, 53, University Road, Lucknow 226007, India
S.C.D. Sah Birbal Sahni Institute of Palaeobotany, 53, University Road, Lucknow 226007, India
R.Y. Singh Birbal Sahni Institute of Palaeobotany, 53, University Road, Lucknow 226007, India

DOI:

https://doi.org/10.54991/jop.1973.918

Abstract

An analysis of palynological samples, collected from Dawki and Cherrapunji areas in Shillong Plateau, Lower Assam, have revealed the occurrence of both miospores and paytoplankton. The samples represent three different formations, viz., Jadukata, Mahadek and Langpar. Present account deals with the taxonomic study of dinoflagellates and acritarchs with a discussion on the age of these formations. Microplankton forms recovered have been described under 21 recognisible genera and 19 species. Out of these, 9 species are new.

Jadukata and Mahadek formations have been assigned an Upper Cretaceous (Maestrichtian) age whereas Langpar Formation has been dated Palaeocene (Danian).

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