Based on the mlcrofossil analysis 14C dadngs sporo·pollen analysis geomorphological and sedimentologlcal investigations of the pests along the coast of Fuiian Province.in this paper the palaeo-enviroments are discussed In which the pests have been developed.The author concludes that the pests were formed in the ternestrlal depressions under the relative cool climatic conditions during the periods of low eustatlc stands.