Assertion: carbonic acid | /r/CapableOf | combine with calcium and magnesium oxides
Facets:
value: to form insoluble carbonates
type: PURPOSE
value: in the crust
type: LOCATION
value: slowly
type: MANNER
Source sentences:
text: Carbon dioxide, an acidic oxide, and carbonic acid have slowly but continuously combined with calcium and magnesium oxides, basic oxides, in the crust to form insoluble carbonates.