1. felsic - Noun
2. felsic - Adjective
felsic (comparative more felsic, superlative most felsic)
(mineralogy) Enriched in the lighter elements such as silicon, oxygen, aluminium, sodium, and potassium.
felsic (plural felsics)
A rock with such properties.
Aplite and porphyry dikes and veins may intrude pegmatites and wall rocks adjacent to intrusions, creating a confused sequence of felsic intrusive apophyses (thin branches or offshoots of igneous bodies) within the aureole of some granites. Source: Internet
Beryllium becomes concentrated in felsic pegmatites in which chromium is almost absent. Source: Internet
Quartz grains evolve from plutonic rock, which are felsic in origin and also from older sandstones that have been recycled. Source: Internet
Chemically, mafic rocks are on the other side of the rock spectrum from the felsic rocks. Source: Internet
Felsic, intermediate and mafic igneous rocks Those rocks that contain the most silica, and on crystallizing yield free quartz, form a group generally designated the "felsic" rocks. Source: Internet
In terms of chemistry, felsic minerals and rocks are at the other end of the elemental spectrum from the mafic minerals and rocks. Source: Internet