摘要
详述扬子区晚奥陶世晚期 (阿什极期 )至兰多维列世初期的生物带序列 ,修正部分的笔石带 ,与全球各重要地区进行对比。研究表明 ,全球奥陶系顶部赫南特亚阶及其上下地层在我国的扬子区发育最好 ,地层连续发育并广泛出露 ,生物带发育齐全 ,不但有连续的笔石带 ,而且有世界广布的赫南特贝腕足动物群 ,有望在我国建立赫南特亚阶的全球层型剖面和点(GSSP)。
Latest Ordovician to earliest Silurian (through the Hirnantian Substage) strata and fossils are widely distributed on the Yangtze platform. Mu (1974) first erected the Ashgillian graptolite zones in this region. In the recent years, the present authors re studied 4 sections (Wangjiawan and Fengxiang, Yichang; Honghuayuan, Tongzi and Ludiping, Songtao) through this interval with continuous collections. Based on their detailed works the Ashgillian to earliest Llandovery biozones of the Yangtze region have been revised as follows. Llandovery (Silurian) Cystograptus vesiculosus Biozone Parakidograptus acuminatus Biozone Akidograptus ascensus Biozone Ashgillian (Ordovician) N. persculptus Biozone Hirnantia Dalmanitina N. extraordinarius N. ojsuensis Biozone Fauna Paraorthograptus pacificus Biozone Diceratograptus mirus Subzone Tangyagraptus typicus Subzone Un named Subzone Dicellograptus complexus Biozone Dicellograptus complanatus Biozone/ Foliomena Nakinolithus Fauna A global correlation has been discussed in detail and shown in Table Ⅰ among the Yangtze region and Dob's Linn, Scotland, Spain and Portugal, Thuringia Saxonia Bavaria, Germany, Bohemia, Poland, Southern Kazakhstan, Kolyma, Northeastern Siberia, Malaysia Peninsula, Canadian Yukon and Canadian Arctic Islands, Nevada, USA, San Juan and Talacasto, Argentina, and Darraweit Guim, central Victoria, Australia.
出处
《古生物学报》
CAS
CSCD
北大核心
2000年第1期100-114,共15页
Acta Palaeontologica Sinica
基金
中国科学院重点研究项目!(KZ95 2 J1 40 1和KZ95 2 J1 0 2 3 )
国家自然科学基金!( 490 72 0 0 5和 496 72 0 83 )
南京地质古生物研究
