湖南石门杨家坪早寒武世生态地层学

通过对杨家坪地区早寒武世生态地层学研究，建立了其生态地层系统，包括８个群落带、４个群落组和１个群落群，并阐述了各生态地层单位的分布、组成、特征及生态环境和顶底界线，通过生态地层研究，揭示了研究区早寒武世海平面变迁和生态环境演变及其与生油、储油条件的关系．

Study on Early Cambrian Ecostratigraphy of Yangjiaping from Shimen,Hunan Province

Based on the study of early Cambrian ecostratigraphy of Yangjiaping area,the authors established itsecostratigraphic system which contains eight community zones,four community formations and one communi-ty gathering.The distributions,compositions,characters,ecologic environments and the top bottom boundarylines of these ecostratigraphic units were showed.The authors also disscussed early cambrian sea levelchanges and the relationship between ecologic environment and the conditions of oil-generating and oil-storageof the studying area.