Scientific analysis reveals that the colors were derived from ocher and other iron oxides ground into a fine powder.
科学分析表明，这些颜色是源自赭石和其他铁氧化物磨成的细粉。
These cave artisans had stones for pounding and grinding colorful dirt enriched with a kind of iron oxide to a powder, known as ocher.
他们这些洞穴工匠用石头来碾碎和研磨各种色彩的含金砂到一种粉末。科学家们认为这种含金砂是一种富含氧化铁的赭石。
应用推荐