Assertion: mantle's position | /r/CapableOf | fluctuate on millennial timescale
Facets:
value: considerably
type: DEGREE
Source sentences:
text: The position of the flux lobes seems to fluctuate considerably on a millennial timescale around the long-term mean position (Amit et al., 2010, 2011; Korte and Holme, 2010).