Ⅰ.The different geological formations and their economic sigmficances.(a)Alluvium(b)Loess(c)Red beds(d)Upper coal series and Sandstone formations(e)Lower coal series(f)Metamorphic seriesⅡ.Human Relations from the St...Ⅰ.The different geological formations and their economic sigmficances.(a)Alluvium(b)Loess(c)Red beds(d)Upper coal series and Sandstone formations(e)Lower coal series(f)Metamorphic seriesⅡ.Human Relations from the Standpoint of physiographical observations.展开更多
文摘Ⅰ.The different geological formations and their economic sigmficances.(a)Alluvium(b)Loess(c)Red beds(d)Upper coal series and Sandstone formations(e)Lower coal series(f)Metamorphic seriesⅡ.Human Relations from the Standpoint of physiographical observations.
