Question

define acidic igneous rocks​

Answer 1

Answer:

Lakes on silica-rich (“acidic”) rocks don't react with the rocks and accumulate acid rain, whereas lakes on “basic” rocks leach Mg and Ca from the rocks and neutralize acid rain. 'Acidic' igneous rocks are rocks which are relatively high in silica and relatively low in iron and magnesium.

Answer 2

Answer:

The acidic igneous rocks (commonly referred to as “acid” rocks and rarely as acidites) comprise those rocks, whatever their origin and whatever level of the crust in which they crystallize, that are sufficiently silica-rich to contain modal (actual) or normative (theoretical) quartz in quantities of about 10% or more.

Explanation:

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