Assertion: silica | /r/AtLocation | nature
Facets:
value: as quartzite
type: OTHER
value: commonly
type: TEMPORAL
value: as silica sand
type: MANNER
value: as sandstone
type: MANNER
Source sentences:
text: Silica (SiO 2) occurs commonly in nature as sandstone, silica sand or quartzite.
text: : Silica is a solid substance (silicon dioxide) that occurs in various form in nature (e.g. sand, quartz, minerals).
text: Silica occurs commonly in nature as sandstone, silica sand or quartzite.