Assertion: tourmaline's range | /r/CapableOf | form in impure lithology units
Facets:
value: along fluid boundaries
type: LOCATION
Source sentences:
text: This process is called isochemical metamorphism, and can result in the production of a wide range of calc-silicate minerals that form in impure lithology units and along fluid boundaries where small-scale metasomatism occurs (argillite and limestone, and banded iron formation).