Abstract
This article integrates palaeobotanical and palynological analysis to establish palynostratigraphic succession and depositional environment for the borecore MGK-6 from Kachinapalli area of Lingala-Koyagudem coal belt of Godavari Graben, South India. Palynological analysis in sub-surface sediments of 490.10 m deep borecore have divulged occurrence of three palynoassemblages. Palynoassemblage I at 314.25-346.65 m is marked by dominance of nonstriate disaccates Scheuringipollenites maximus, S. tentulus along with subdominance of few striate disaccates chiefly Striatopodocarpites decorus, Faunipollenites (=Protohaploxypinus) varius, F. bharadwajii. Palynoassemblage II at 220.70-298 m is characterized by dominance of striate disaccates viz., Striatopodocarpites tiwarii, Faunipollenites bharadwajii, Striatites varius, Strotersporites indicus, S. communis, Lunatisporites diffuses, L. ovatus with subdominance of nonstriate disaccates Scheuringipollenites maximus, S. tentulus and Ibisporites jhingurdahiensis. Palynoassemblage III identified at 46.75-206.70 m shows dominance of striate disaccates viz., Striasulcites ovatus, Striatopodocarpites diffuses, S. tiwarii, Faunipollenites bharadwajii, F. varius, F. parvus, F. goraensis and Crescentipollenites globosus, C. brevis along with a number of stratigraphically significant taxa viz., Strotersporites indicus, Lunatisporites diffusus, Corisaccites alutas, Guttulapollenites hannonicus, Klausipollenites sp., Falcisporites zapfei, F. nuthallensis, Weylandites circularis, Striomonosaccites circularis and Chordasporites sp. Palynoassemblage I (Barakar palynoflora) belongs to Artinskian age while, Palynoassemblages II and III (Raniganj palynoflora) belongs to Guadalupian age. The dominance of arborescent vegetation (glossopterids and conifers), low proportion of spores (lycopsids, sphenopsids and filiciopsids) and scare presence of algal elements suggests that Kachinapalli palaeomire landscape was located in more inland area and the coal was formed in peat swamp forest environment situated in fresh water settings.
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