如果大气中存在的二氧化碳太多，磁铁矿则无法形成；

Too much CO2, and magnetite can't form, whereas the opposite is true for siderite.

youdao

如果大气中存在的二氧化碳太多，磁铁矿则无法形成；

Too much CO2, and magnetite can't form, whereas the opposite is true for siderite.

youdao