Assertion: continental crust | /r/HasProperty | old
Facets:
value: quite
type: DEGREE
Source sentences:
text: Continental crust is thick and old -- on average about 50 km thick and about 2 billion years old -- and it covers about 40 percent of the planet.
text: While buoyant continental crust is old geologically, denser oceanic crust is continuously created at mid-oceanic ridges.
text: While oceanic crust is mostly young igneous rocks, continental crust is old and buoyant.
text: Unlike continental crust that remains at its place and is quite old, oceanic crust is continuously being made by oceanic ridges where tectonic plates slide and rub with each other.