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作 者:杨遵仪[1]
机构地区:[1]中国地质大学
出 处:《第四纪研究》1993年第4期320-329,共10页Quaternary Sciences
摘 要:袁复礼教授20—30年代对甘肃、新疆等省区的地层古生物研究做了开拓性工作,多有发现。本文阐述了他创立的几个地层单位——平凉笔石层、臭牛沟组、石钱滩泥灰岩(组)、大龙口层(组)、东红山层(组)、烧房沟层(组)、水西沟组(群)的意义,包括他对兽形爬行类化石的重大发现。同时,还介绍了他对甘肃东、西北部石炭纪地层以及准噶尔东部地层的主要研究成果。During his geological excursions to Gansu and Xinjiang Provinces in 1920s—1930s Professor Yuan Fuli carried out a tremendous amount of pioneering work on stratigraphy and paleontology with many discoveries. He proposed such stratigraphic units as the Pingliang graptolites beds, the Chouniugou formation, the Shiqiantan marl (fm), the Dalongkou beds (fm), the Donghongshan beds (fm) and Shaofanggou beds (fm), which are still valid today and are retold briefly as follows. Besides, the present article also explains Yuan's stratigraphic observations in East Gansu, Northwest Gansu and Eastern Junggar. The Pingliang graptolites beds. These beds were discovered in Ordovician shale in 1923 at Guanzhuanggou, 10 km southwest of Pingliang County and the graptolites identified by A. W. Grabau consisting of 12 species in 7 genera as follows: Climacograptus bicornis Hall, C. parvus Hall, Didymograptus sagitticaulis Gurley, D. serratulus Hall, Dicellograptus divaricatus (Hall), Nemagraptus exilis (Lapw.), N. gracilis (Hall), Dicranograptus cf. furcatus (Hall), D. clingani Carruthers, Diplograptus (Glyptograptus) angustifolius (Hall), D. (G.) teretiusculus (His.) var. kansuensis Grabau var. nov., Orthograptus whitfieldi (Hall). These graptolites confirm an early Middle Ordovician age. The Chouniugou formation. This formation exposed some 35km southwest of Wuwei County is marked as bed 4 in the Chouniugou section and the rich fossils (Productus giganteus maximus M'Coy, P. giganteus depressa Chao, P. undulatus Defrance, P. elegans M'Coy) indicate for the first time the presence in China of Early Carboniferous Viscan stage. The Shiqiantan marl (fm). The formation developed around the Permian dormal structure near Shiqiantan ca 100km northeast of Qitai is divisible into the upper greenish grey thin-bedded marl and the lower reddish dense limestone. It had been assigned to the Permo-Carboniferous (Yang, 1948), the Permian (Artinskian, 1952 in Yuan, 1956) and Middle-Upper Carboniferous (Wu et Zhao, 1982). The Dalongkou beds (fm).
分 类 号:Q91-3[天文地球—古生物学与地层学]
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