Assertion: moraine | /r/HasProperty | created
Facets:
value: during the glacier's retreat
type: TEMPORAL
Source sentences:
text: During the glacier's retreat, a moraine was created, forming a natural dam holding back the waters from the melting glacier and forming Glacial Lake Horicon.
text: It is here that the moraines attain their greatest volume and are best developed, many of them resembling artificial embankments, evenly graded and laid out in smooth curves.