About: http://webisa.webdatacommons.org/77062306

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	Uranium-lead isotope measurements suggest that the Canyon is at least 6 million years old and was cut at rates of between 55 and 400 metres per million years.
http://www.w3.org/ns/prov#wasQuotedFrom	sciblogs.co.nz