Jurassic spores and pollen grains from the Rajmahal Hills, Bihar, India: With a discussion on the age of the Rajmahal Intertrappean beds

Abstract

The present paper describes a rich mioflora obtained by maceration from carbonaceous shales collected from Sakrigalighat and Basko in the Rajmahal Hills, Bihar. The mioflora comprises 51 species belonging to 35 genera. The spores and pollen grains have been described here according to the system of classification proposed by Potonie and Kremp (1954, 1955 & 1956) and Potonie (1956, 1958 & 1960). The Sakrigalighat and Basko mioflora referred to the Rajmahal miofloral assemblage has been compared with the Mesozoic miofloras of India [including Nipania (Rajmahal Hills), Vemavaram (East Coast) Dhrangadhra (Saurashtra), Jabalpur and Cutch); Pakistan (Salt Range); Ceylon (Andigama); Australia; Britain and Canada. The age of the Rajmahal Series is concluded to range between Middle and Upper Jurassic (Bajocian to Oxfordian).