Silicic

Silicic is an adjective to describe magma or igneous rock rich in silica.

The amount of silica that constitutes a silicic rock is usually defined as at least 63 percent.

These are just part of all the other silicate minerals that make up 90% of the earth's crust.

This broad classification is refined in practice based on more detained compositional studies where ever possible in the science of mineralology.

The "Shammar group" is a silicic and volcaniclastic sequence in northwestern Saudi Arabia.

Silicic refers to the uncoloured igneous rocks to the right in this TAS classification ( Na 2 O + K 2 O ) versus silica ( SiO 2 )
In this top of a QAPF diagram for classification of plutonic rocks, silicic rocks are uncoloured at the top of the figure (Q is for Quartz which is pure silica)