云南禄丰地区首次发现晚侏罗世早期轮藻化石组合
Discovery of an early Late Jurassic charophyte assemblage in Yunnan
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摘要: 近年来云南禄丰地区在地层学方面有两项重要的进展：①川街盆地不仅具有“禄丰晰龙动物群”， 在其上部还相继发现了中侏罗世“川街龙动物群”和相当晚侏罗世的恐龙化石；②按照国际地层规范，厘定并新建了一套侏罗纪岩石地层单位。新近又在前人称之为“上禄丰组”下部（川街组）及“酒红层”（麻地山组）中分别鉴定出中侏罗世轮藻组合Aclistochara maanshanensis-Aclistochara abshirira-Aclistochara karierica和晚侏罗世早期轮组合Aclistochara jaisalmerensis-Aclistochara karierica-Mesochara voluta。这一晚株罗世早期轮藻化石组合在中国属首次发现。Abstract: Two major advances have been made in recent years in the stratigraphic study of the Lufeng area,Yunnan,i.e.:the successive discoveries of the Middle Jurassic Chuanjiesaurus fauna and Late Jurassic dinosaurs above the Lufeng prosauropod fauna in the Chuanjie basin,and the erection and revision of the local Jurassic lithological units according to the international Stratigraphical Guide.Recently the Middle Jurassic charophyte Aclistochara maanshanensis-Aclistochara abshiriri-Aclistochara karierica assemblage and the early Late Jurassic charophyte Aclistochara jaisalmerensis-Aclistochara karierica-Mesochara voluta assem-blage have been identified in the Chuanjie Formation(the lower part of the Shanglufeng Formation)and the"vine-red beds"(Madishan Formation)respectively.The latter was first discovered in China.
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Keywords:
- Chuanjie /
- Yunnan /
- Late Jurassic /
- charophyte
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