北祁连山发现晚志留世牙形刺

1980年我队进行地层断代总结时对原测“北石门子—泉脑沟山—旱峡”剖面重新进行了观察和研究。在原划为志留纪中统的泉脑沟山群之灰岩中系统采集了牙形刺样品,在其底部采得腕足类化石,部分层位中采集到了珊瑚化石。牙形刺样品经南京古生物研究所分

THE DISCOVERY OF LATE SILURIAN CONODONTS IN THE NORTHERN QILIAN MOUNTAINS

In the western sector of the Northern Qilian Mountains,late Silurian conodonts,namely,Ozarkodina cf. remscheidensis eosteinhornensis （Walliser）and Synprioniodina cf. silurica Walliser,have been found in Member"q3"of the upper part of the middle Silurian Quannaogoushan Group which was formerly determined by the Qilianshan Geological Team of the Chinese Academy of Sciences. In this paper,according to the age of the conodonts and the thological changes,Member "q3"of the Quannaogoushou Group is assigned to the upper Silurian.