About: http://webisa.webdatacommons.org/325323586

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	However, there is a not entirely negligible amount being extruded by mid-oceanic rifts and volcanos, so there will continue to be a small supply that becomes physically reachable ...
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com