泉头阶

是中国陆相下白垩统顶部的一个阶,位于孙家湾阶之上,上白垩统底部青山口阶之下。阶名源自岩石地层单位泉头组,层型剖面选在辽宁昌图泉头火车站往北进入松辽盆地内的一钻孔剖面。泉头阶的底界以被子植物花粉的首现为标志。本阶包含二个孢粉组合:下部为TrilobosporitesCyathiditesTricolporopollenites组合,其中含4属被子植物花粉Polysporites,Tricolporopollenites,Tricolpites,Gothanipollis;上部为SchizaeoisporitesQuantonenpollenitesTricolporopollenites组合,本组合中被子植物花粉除下组合的4属外,新出现了Magnolipollis,Palmaepollenites,Cupuliferoidaepollenites,Querceidites,Salixipollenites,Tetracolpites,Fraxinoipollenites,Triporopollenites,Zhaodongpollis和Quantonenpollenites等。本阶上部含有较丰富的被子植物化石,主要有:Platenus septentrionalis,Viburniphyllum serrulatum,Viburnum cf. marginlum,Tilia cf. jacksoniana,Protophyllum undulatum,Quercus sp.等;另有一轮藻Amblyochara quantouensis带和介形虫、叶肢介等化石。

Concept & Semantic
  11

Contributor

contributed at 2011-10-11

Classification(s)

Earth System(in Chinese)Geostratigraphic stratigraphy

Detailed Description

EN_US
Name Quantouan Stage
ZH_CN
Name 泉头阶
Description 是中国陆相下白垩统顶部的一个阶,位于孙家湾阶之上,上白垩统底部青山口阶之下。阶名源自岩石地层单位泉头组,层型剖面选在辽宁昌图泉头火车站往北进入松辽盆地内的一钻孔剖面。泉头阶的底界以被子植物花粉的首现为标志。本阶包含二个孢粉组合:下部为TrilobosporitesCyathiditesTricolporopollenites组合,其中含4属被子植物花粉Polysporites,Tricolporopollenites,Tricolpites,Gothanipollis;上部为SchizaeoisporitesQuantonenpollenitesTricolporopollenites组合,本组合中被子植物花粉除下组合的4属外,新出现了Magnolipollis,Palmaepollenites,Cupuliferoidaepollenites,Querceidites,Salixipollenites,Tetracolpites,Fraxinoipollenites,Triporopollenites,Zhaodongpollis和Quantonenpollenites等。本阶上部含有较丰富的被子植物化石,主要有:Platenus septentrionalis,Viburniphyllum serrulatum,Viburnum cf. marginlum,Tilia cf. jacksoniana,Protophyllum undulatum,Quercus sp.等;另有一轮藻Amblyochara quantouensis带和介形虫、叶肢介等化石。

How to cite

NNU_Group (2020). 泉头阶, Concept & Semantic, OpenGMS, https://geomodeling.njnu.edu.cn/repository/concept/665429dc-dc1b-4c50-8b7d-0ba6092baed1
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contributed at 2011-10-11

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