Assertion: iridium | /r/CapableOf | descend below the crust
Facets:
value: because of siderophilic
type: CAUSE
value: into earth's core
type: TRANSITIVE-OBJECT
value: because of the density
type: CAUSE
Source sentences:
text: It is thought that the total amount of iridium in the planet Earth is much higher than that observed in crustal rocks, but as with other platinum-group metals, the high density and tendency of iridium to bond with iron caused most iridium to descend below the crust when the planet was young and still molten.
text: The overall concentration of iridium on Earth is thought to be much higher than what is observed in crustal rocks, but because of the density and siderophilic ("iron-loving") character of iridium, it descended below the crust and into Earth's core when the planet was still molten.