叠层石和臼齿构造是前寒武纪较为引人注目的两种沉积现象。
Stromatolite and molar-tooth structures are two kinds of peculiar Precambrian sedimentary phenomena, attracting great attention from geologists.
据专家解释，这种现象非常罕见，原因是脂蛋白代谢异常或脂质沉积症，目前尚不清楚血液变色原因。
According to experts, this phenomenon caused bymetabolic abnormality of lipoprotein or lipoidosis is very rare. The reasonof the changing of the blood color is still unknown.
来自海洋板块中碳元素混杂在如此之深的地幔中这一现象的发现使人们产生更大的疑问，到底有多少海洋板块和沉积物被带到深层地幔中。
The discovery that carbon from the ocean floor can be mixed so deep within the mantle raises the larger question of how much of the ocean floor and sediments are carried to the deep mantle.
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