About: http://webisa.webdatacommons.org/34175489

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	Due to such effects as weathering from the elements, the near-surface layer often tends to have a lower velocity than layers deeper in the earth.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com