题目内容
The eight most abundant elements in the continental crust are Si, O, Fe, K, Mg, Na, Ca, Al.
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Wells are drilled into the subsurface to remove water from the unsaturated zone.
Which era are we currently in?
Earth's outermost layer, consisting of the crust and upper mantle, is called the lithosphere.
According to Bowen's reaction series, quartz is often the last mineral to crystallize from a melt.
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