中国当阳跑马岗组白垩-古近系界线附近的轮藻组合(英文)  

CHAROPHYTE ASSEMBLAGES AROUND CRETACEOUS-PALEOGENE BOUNDARY FROM THE PAOMAGANG FORMATION IN DANGYANG (CHINA)

作　　者：李伟同[1] 

机构地区：[1]江汉石油学院,湖北荆州434023

出　　处：《微体古生物学报》2003年第2期183-186,共4页Acta Micropalaeontologica Sinica

基　　金：国家自然科学基金资助项目 ( 4 0 0 72 0 0 9)

摘　　要：陆相白垩 -古近系过渡段的生物地层记录通常稀少而不连续。从轮藻角度讲 ,中国当阳跑马岗组的白垩 -古近系过渡段的生物地层记录是世界上迄今所知的最连续和最丰富的。该过渡段剖面的介形类也非常丰富 ,其它建立界线辅助层型所需的许多条件也很好 ,或许当阳跑马岗组剖面可作为白垩 -古近系界线陆相辅助层型的候选剖面。对该剖面白垩 -古近系界线附近的轮藻组合作了简要的介绍。The biostratigraphic records of the Cretaceous-Paleogene transition are often discontinuous and scarce in the continental domain. From the point of view of charophytes, the biostratigraphic records from the Paomagang Formation in Dangyang (China) are most continuous and abundant known so far in the world. The transition section in Dangyang is also very rich in fossil ostracods. It also meets many other requirements for an auxiliary boundary-stratotype. Perhaps, the transition section of the Paomagang Formation in Dangyang could be a potential candidate for continental auxiliary stratotype of the Cretaceous/Paleogene boundary. The charophyte assemblages around the Cretaceous/Paleogene boundary at the section are presented briefly here.

关 键 词：轮藻 白垩系-古近系界线 层型 跑马岗组 陆相 江汉盆地 中国 

分 类 号：Q914[天文地球—古生物学与地层学]