A new early Visean coral assemblage has been recorded from turbidite facies in the south part of the Azrou-Khenifra Basi......

Stromatoporoid sponges were very abundant during the middle Palaeozoic Era and are thought to disappear at the end of th......

As one of the representative members of the Late Palaeozoic Cathaysian flora, Cathaysiodendron has been previously recor......

牙形刺、有孔虫和菊石是全球维宪阶与谢尔普霍夫阶界线层生物地层研究的重要化石门类.该界线定义及其候选层型剖面目前均未正式确......

简要介绍了杜内阶-维宪阶界线定义的历史和现状,包括舍费尔德会议原始定义,牙形石Guathodus texa-nus带底界定义,有孔虫Eoparastaf......