Assertion: mound's base | /r/CapableOf | measure 560 x 410 ft
Facets:
Source sentences:
text: Approximately 1.2 miles (2.2 km) to the north of the Poverty Point earthworks is the Motley Mound (16WC7), which is 52 ft (16 m) in height with a base that measures 560 x 410 ft (170 x 125 m).