About: http://webisa.webdatacommons.org/433332634

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Denser materials like iron sank into the core of the Earth, while lighter materials such as oxygen compounds and water rose near the surface.
http://www.w3.org/ns/prov#wasQuotedFrom	usgs.gov