lower-middle devonian的意思|示意

The lead-zinc deposits occur in the Lower Silurian Meiziya Formation, Middle Silurian Shuanghezhen Formation, Middle Devonian Dafenggou Formation and Upper Devonian Nanyangshan Formation.

铅锌矿赋存于下志留统梅子垭组、中志留统双河镇组及中泥盆统大枫沟组、上泥盆统南羊山组；

According to lithostratigraphic units, Devonian was divided into the Lower Devonian Malassu Formation and the Middle Devonian Kourou Moody Formation.

根据岩石地层单位将该区泥盆系划分为下泥盆统马拉苏组和中泥盒统库鲁木迪组。