摘要
以辽河断陷东二段与东一段分界为例,阐明了处在湖水退缩的盆地中,湖盆边缘地区分布的化石组合特征,不一定与湖盆中心地区一致。适应性较强的广布种类比窄布种类有较长的延续时限。要正确对比地层必须把化石组合分解成标志化石带,结合古生态、沉积环境,尤其要把标志化石带与电测、岩性标准层、地震界面的追索,综合起来进行研究。
Taking the boundary between the First and the Second Member of the Dongying For-mation of Liaohe Fault-depression as an example, the authors clarify that the characteristics of fossil assemblages below or above the boundary in the marginal areas of a regression lake basin are different from that of the centre part, and that widely spreaded species with stronger adaptation lasted for a longer geologic time than the narrowly spreaded ones. The fossil zones separated out from the fossil assemblage, paleoecology and sedimentary environment should be synthetically studied, and the seismic reflection boundary should be followed, so that a stratigraphic correlation may be improved.
出处
《石油学报》
EI
CAS
CSCD
北大核心
1992年第2期245-251,共7页
Acta Petrolei Sinica
