Abstract
Palynological investigations are summarized for several hundred cores and cuttings samples from the Permian, Triassic, and Jurassic found in about 30 wells drilled by the Societe des Petroles de Madagascar in the Morondava Basin (southwest of Madagascar). The nature of the microflora, which includes about 300 forms of organic microfossils (numerous spores and End_Page 269------------------------------ gymnospermic pollen grains, a few Hystrichospheres and Dinoflagellates) is presented. Evolutionary trends of the associations and lateral variations and environmental influences are discussed. Choice of stratigraphical characteristics and zonation of the series, which have an aggregate thickness of several thousand meters, are indicated. Correlation is made between wells at distances extending to as much as 600 kilometers and across various deposits of continental, brackish, and marine facies. End_of_Article - Last_Page 270------------
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