Information on latest early Olenekian(latest Smithian)ammonoids is available apparently from only seven regions of the w......

Information on latest early Olenekian (latest Smithian) ammonoids is available apparently from only seven regions of the......

贵州青岩地区的青岩组上部包括雷打坡段和渔庆段,其中,雷打坡段的化石特别丰富,为研究二叠纪末生物大灭绝后底栖动物的辐射和群落......

基于一些业已报道的中国Kungurian期至Roadian期界线附近的菊石材料(26个属,48个种),对其进行壳的形态空间分析,发现空谷期菊石在......

Data obtained on conodont distribution in the Permian-Triassic Sovetashen Section of Transcaucasia provide further limit......

Data obtained on conodont distribution in the Permian-Triassic Sovetashen Section of Transcaucasia provide further limit......

根据长兴期菊石的地理分布,共生生物(牙形石、放射虫)的生存环境,围岩的化学元素含量和元素间的比值,以及古地磁资料,认为该时期菊......

记述的菊石采自鄂东南大冶柯家湾晚二叠世大隆组,主要产于硅质页岩、硅质岩的灰岩透镜体中,共8属11种.此区大隆组仅相当于长兴阶的......