Assertion: moraine | /r/CapableOf | approach one another
Facets:
value: until at length
type: TEMPORAL
value: gradually
type: MANNER
Source sentences:
text: The loose rock grains washed down from them accumulate to form sandy terraces between the crests On the rocky slopes of the promontory southeast of Sunrise Creek the higher moraines of the series gradually approach one another until at length they unite by twos or threes to form massive embankments from 10 to 50 feet in height.