鄂尔多斯盆地东北缘中侏罗统延安组植物群与古气候分析

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The Flora from the Middle Jurassic Yan’an Formation in the Northeastern Margin of Erdos Basin and Discussion on the Palaeoclimate

GE Yu-hui, SUN Chun-lin, LIU Mao-xiu

College of Earth Sciences, Jilin University, Changchun 130061, China

Received:2005-06-01 Revised:1900-01-01 Online:2006-03-26 Published:2006-03-26
Contact: GE Yu-hui

Abstract

Abstract: The Middle Jurassic Yan’an Formation in the Northeastern Margin of Erdos Basin belongs to a succession fluvial and shore facies middlefine grained feldspar sandstone, siltstone (pelitic siltstone), black shale, claystone intercalated with coal seams, in which there occur many plant fossils of 39 species belonging to 20 genera. It is considered that the fossils belong to the North Floristic province represented by ConiopterisPhoenicopsis in the early Middle Jurassic. This indicates that the Northeastern Margin of Erdos Basin had a slightly humid and warm climate condition in the age of the Middle Jurassic.

Key words: Erdos Basin, Middle Jurassic, plants fossil, warm climate

CLC Number:

Q914.5

GE Yu-hui, SUN Chun-lin, LIU Mao-xiu. The Flora from the Middle Jurassic Yan’an Formation in the Northeastern Margin of Erdos Basin and Discussion on the Palaeoclimate[J].J4, 2006, 36(02): 164-0168.

References

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