... asean rocks 亚细安摇滚音乐节 atmospheric rocks 气成岩 attitude of rocks 岩层产状 ...
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In the older rocks below these glacial deposits are detrital uraninite and pyrite two minerals considered evidence for very low levels of atmospheric oxygen.
这些冰河沉积物下方的较老岩层,是沥青铀矿与黄铁矿碎屑;这两种矿物被认定为大气中氧气极为稀少的证据。
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