Assertion: magma's composition | /r/HasProperty | 74 wt% sio 2
Facets:
Source sentences:
text: Hornblende, plagioclase, and magnetite microphenocrysts and microlites crystallized to produce the diktytaxitic groundmass texture and drive the matrix melt to an evolved rhyolitic composition (74 wt% SiO 2 ).