【摘要】 <正> 泰州组露头仅零星见于仪征县小河口地区,广大苏北坳陷内据钻井揭示,除建湖隆起及其它个别地区外,一般均有分布,厚度在30—300米间,最厚达400米。并可划分为两个岩性段,即上部泥岩段和下部砂岩段。其岩性除金湖凹陷和高邮凹陷西北部,以咖啡色、棕灰色、紫红色等一红到底的杂色砂泥岩互层,上下分层不明显外,其它各区的上部泥岩段则多以灰黑色泥岩为主,局部地区在其顶部有厚度不等的杂色泥岩、砂泥岩层;下部砂岩段,以棕灰色、浅灰至灰白色粉砂岩、细砂岩为主,夹少量灰紫色或灰黑色粉砂质泥岩,底部常有厚度不等的砂砾岩或砾岩存在。泰州组中的孢粉及介形类化石更多还原

【Abstract】 Northern Jiangsu Depression is a fault-down basin of 32,000 km~2 located in the second uplifted belt of NNE trending-Neocathaysian tectonic system. Sediments have been deposited since Paleozoic, of which the Tertiary is especially important for oil.This paper consists of three parts.l.The sporo-pollen and ostracoda assemblages in Taizhou Formation of the early, middle Paleocene and its time attribution are outlined.2.In the light of the features of sporo-pollen and ostracoda. assemblages, the palaeoclimate, palaeovegetation and palaeogeography environments of deposition period of Taizhou Formation are discussed.3.By using the distribution, taphonomy, differentiation, evolution and type characteristics of sporo-pollen and ostracoda fossils, the relationship between the environment of deposition period of Taizhou Formation and the source rock sequences are expounded.更多还原