From the Cambrian to the early Middle Ordovician, the Cambrian radiolaria and the Early Ordovician conodonts of the Erlangping trough in the northern part of EQM, and the Cambrian trilobites and Early Ordovician conodonts as well as cephalopods of the nor
From the Cambrian to the early Middle Ordovician, the Cambrian radiolaria and the Early Ordovician conodonts of the Erlangping trough in the northern part of EQM, and the Cambrian trilobites and Early Ordovician conodonts as well as cephalopods of the nor
在寒武纪至中奥陶世早期，东秦岭北部二郎坪海槽的寒武纪放射虫和早奥陶世牙形石与东秦岭南部浙川陆棚北部的寒武纪三叶虫、早奥陶世牙形石和头足类属华南生物省，而浙川陆棚南部的寒武纪三叶虫和早奥陶世牙形石属于华南生物省，兼有华北生物省分子。