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Wells are drilled into the subsurface to remove water from the unsaturated zone.

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Which era are we currently in?

A. Mesozoic
B. Precambrian
C. Paleozoic
D. Cenozoic

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.

In Bowen's reaction series, the minerals that form last are the most susceptible to chemical weathering.

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