Assertion: surface | /r/CapableOf | make flat horizons
Facets:
value: at the grand canyon
type: LOCATION
value: remarkably
type: DEGREE
Source sentences:
text: The warming of the underlying lithosphere in late Cenozoic time (66 million years ago to the present) caused that area to rise to its present elevation, and those erosion-resistant formations dating to Paleozoic time define the surfaces that make the remarkably flat horizons at the Grand Canyon.