Assertion: opal | /r/CapableOf | fill cavity
Facets:
value: in rhyolite
type: LOCATION
value: in igneous
type: LOCATION
Source sentences:
text: Opal is found lining and filling cavities in igneous and sedimentary rocks, where it has evidently been deposited through the agency of flowing waters.
text: By contrast, opal from Mezezo fills cavities in rhyolite, forming nodules.