middle ordovician epoch
常見例句
- That a: The Mn-deposits of Middle Ordovician Epoch in central Hunan were high grade Mn-ores with low-P, low-Fe and high basicity;
提出：①湘中地區(qū)中奧陶世錳礦是低磷、低鐵、高堿度優(yōu)質(zhì)錳礦石； - Comprehensive researches have concluded that the Heishan ophiolite was formed in Nanhua Ordovician period and its structural location in Silurian period early Middle Devonian epoch.
綜合研究得出黑山蛇綠巖形成于南華—奧陶紀，構(gòu)造就位于志留紀—早中泥盆世。 返回 middle ordovician epoch