the early cambrian

基本解释

In South China, the Early Cambrian black rock series is rich in metallic and nonmetallic mineral ersources.
我國南部早寒武世黑色巖系中，蘊藏豐富的金屬和非金屬鑛産。
Protoconodonts and conodont-like microfossils are characteristic components in the early Cambrian skeletal faunas.
原牙形類和牙形狀化石是早寒武世微小骨骼化石中非常特征的一個類群。
Kuanchuanpu biota is the Early Cambrian microfossil which is characterized as an early animal and plant fossil in the southern region of Shaanxi province.
寬川鋪生物群是陝南地區早寒武世早期一個以微躰動、植物化石爲特色的生物群。