Ordovician period
The Cambrian - Ordovician strata in Luxi Block are very continuous and well exposed.
鲁西地块的寒武 - 奥陶纪地层出露连续,露头较好。
—— 给力词典精选NOTES ON THE GENUS REEDOCALYMENE KOBAYASHI, 1951 ( TRILOBITA, ORDOVICIAN )
论奥陶纪三叶虫属ReedocalymeneKobayashi, 1951 ( 英文 )
—— 给力词典精选The Ordovician lithofacies and biofacies change greatly at different localities of the Yangtze Region, South China.
华南扬子区不同地点奥陶纪的岩相 、 生物相变化显著。
—— 给力词典精选A rift trough along Mianxian - Lueyang ophiolitic melange belt was formed from Ordovician to Silurian.
奥陶纪—志留纪大致沿勉略构造带形成南秦岭裂陷槽。
—— 给力词典精选Bryozoa was quite diversified in the Ordovician, but lacked fossil records in the Cambrian.
古生物学资料表明,虽然苔藓动物的大多数类群在奥陶纪已经分化出来, 但它在寒武纪却缺乏任何化石记录。
—— 给力词典精选