The present paper describes in detail the dispersed spores and pollen grains from Andigama (Ceylon) shales which were previously recorded by one of us (SAH, 1953). The present study throws more light on the probable age of these beds. The assemblage points towards their being younger in age than the Rajmahal assemblage (Nipania, Sakrigalighat and Basko) and older than the Lower Cretaceous. It has been concluded that the Andigama beds are Upper Jurassic in age.
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).
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).
The present paper deals with four new species of Dadoxylon based on secondary woods. They are D. amraparense, D. mandroense, D. bindrabunense, and D. santalense.
A megaspore assemblage, recovered from the Variegated Stage of Nammal Gorge, Salt Range (W. Pakistan), has been described. The assemblage is characterized by the presence of Banksisporites sinuosus Dettmann, Nathorstisporites hoplificus Jung, N. reticulatus Dettmann, N. nammalensis sp. nov., Nathorstisporites peltasticus Jung, Minerisporites sp. and Hughesisporites novus sp. nov. The Salt Range megaspore flora shows closest affinity with the Rhaetic-Liassic megaspores from South Australia and Tasmania. The Jurassic profile in the Nammal Gorge Section of the Variegated Stage are considered by some geologists to range from Middle to Upper Jurassic while others think they may range from Lower to Middle Jurassic. However, the evidence of the megaspore assemblage described here tends to support a Lower Jurassic (Liassic) age for the two lowermost beds of the Variegated Stage of the Nammal Gorge Section.
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