摘要
依据详细的剖面资料,将鄂尔多斯盆地东北部中侏罗世延安组双壳类分为4个生态组合:Ferganoconcha—Sibireconcha组合、Margaritifera组合、Unio组合、Pseudocardinia?组合;通过化石形态功能分析、现双壳类生态对比分析、产出化石的围岩沉积特征分析,认为上述组合生存环境依次分别为:开阔湖环境、前三角洲(或三角洲间湾)环境、分流间湾环境、三角洲平原小型湖或泛滥平原小型湖环境。
According to the detailed study on Yan'an Formation, Middle Jurassic, four e-coassemblages are established. The four ecoassemblage are checked by using cluster analysis , and their life environments are interpreted as follows: 1)Ferganoconcha-Sibireconcha ecoassemblage-open lacustrine; 2)Margaritifera ecoassemblage-prodelta and inter-delta bay; 3)Unio ecoassemblage-interdistributary bay; 4)Pseudocardinial ecoassemblage-small lake on delta plain and flooding plain.
出处
《地球科学（中国地质大学学报）》
EI
CAS
CSCD
北大核心
1992年第3期353-361,T002,共10页
Earth Science-Journal of China University of Geosciences
关键词
双壳类
生态组合
生存环境
侏罗世
bivalve, ecoassemblage, life environment, Yan'an Formation, Ordos Basin.
