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分析了湘鄂西地区 5个剖面的奥陶纪 Tremadocian期三叶虫动物群 ,识别出 6个三叶虫相 ,即台地的 Asa-phellus- Dactylocephalus相、Dikelokephalinid相、Tungtzuella- Asaphopsis相、Psilocephalina 相 ,陆棚上斜坡的Metayuepingia- shumardiid相 ,陆棚下斜坡的 Olenid相 ;恢复了该地区 C.angulatus期、P.deltifer早—中期和 P.deltifer末期— Serratognatus期三个时段的古地理面貌 ,揭示了区内发生于 G.quadraplicatus期、P.deltifer末期和 Serratognatus中—后期的三次海退事件和发生于 P.deltifer早—中期和 Serratognatus初期的两次海侵事件
The Ordovician Tremadocian trilobite fauna in five sections of western Hubei and western Hubei Provinces was analyzed and six trilobite phases were identified, namely Asa-phellus-Dactylocephalus facies, Dikelokephalinid facies, Tungtzuella-Asaphopsis facies, Psilocephalina facies , The Metayuepingia-shumardiid facies on the slope of the shelf, and the Olenid facies on the slope below the shelf; the paleogeography of the three periods of C. angulatus, P.deltifer and P.deltifer - Serratognatus in this area was restored The three transgressions that occurred in the late-period G.quadraplicatus, P.deltifer and Serratognatus, and the two transgressions that occurred in P.deltifer early-mid-period and Serratognatus early