Silica-oversaturated rocks contain quartz ( or another silica polymorph ).
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Too much of its emphasis is on scattershot tactics, the kind that keep restless, oversaturated rock-video viewers from squirming in their seats.
3.
In an older terminology, silica oversaturated rocks were called " silicic " or " acidic " where the SiO 2 was greater than 66 % and the family term " quartzolite " was applied to the most silicic.
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