Assertion: range's mountain | /r/HasProperty | formed of metamorphic rock
Facets:
Source sentences:
text: The mountains are formed of metamorphic rock derived from quartz sandstones and shales deposited during the Paleoproterozoic Era, between 2,016 and 1,215 million years ago (based on U-Th-Pb isotope geochronology of monazite crystals).