Assertion: comet's water ice | /r/CapableOf | precipitate authigenic sedimentary cores
Facets:
value: with a gneissic composition
type: OTHER
Source sentences:
text: Large KBOs underwent spontaneous ’aqueous differentiation’ at formation by streaming instability (gravitational collapse), internally melting water ice, which precipitated authigenic sedimentary cores with a gneissic composition.