李敬歧, 钱丽君. 陕北榆横煤田延安组孢粉组合及古生态意义[J]. 煤田地质与勘探, 1988, 16(1): 12-17.
引用本文: 李敬歧, 钱丽君. 陕北榆横煤田延安组孢粉组合及古生态意义[J]. 煤田地质与勘探, 1988, 16(1): 12-17.
shu
Sporopollen Assemblage and its Palaeoecologic Significance of Yan'an Formation in Yuheng Coal Field, Northern Shaanxi Province[J]. COAL GEOLOGY & EXPLORATION, 1988, 16(1): 12-17.
Citation: Sporopollen Assemblage and its Palaeoecologic Significance of Yan'an Formation in Yuheng Coal Field, Northern Shaanxi Province[J]. COAL GEOLOGY & EXPLORATION, 1988, 16(1): 12-17.
shu

陕北榆横煤田延安组孢粉组合及古生态意义

Sporopollen Assemblage and its Palaeoecologic Significance of Yan'an Formation in Yuheng Coal Field, Northern Shaanxi Province

    摘要
  • 摘要: 榆（林）横（山）煤田位于陕甘宁盆地北部,面积约8000km2,其地层发育与盆地内部基本一致。在煤田南部的无定河剖面,由老至新依次有上三叠统瓦窑堡组,下侏罗统富县组,中侏罗统延安组、直罗组、安定组等。延安组为本区主要含煤地层。

     

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