Lower Carboniferous

英 美
  • 下石炭统
  • carboniferous n.石炭纪;石炭层adj.含碳或煤的;石炭纪的
  • lower adj.低的;下级的;下层的v.降低;减弱;跌落
Noun:
  1. from 345 million to 310 million years ago; increase of land areas; primitive ammonites; winged insects

    1. Yamansu Formation of the Lower Carboniferous comprises the main ore-bearing formation in the Xiaoshitouquan ore district.
      摘要小石头泉矿区主含矿层为下石炭统雅满苏组第二亚组,火山穹隆及伴生断裂为主要的控矿构造。