PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Clay - Clay is an earthy, extremely fine-grained sediment or soft rock composed primarily of clay-size (diameter less than 1/256 mm [4 microns]) or colloidal (easily suspended because of high surface area) particles, having high plasticity.
http://www.w3.org/ns/prov#wasQuotedFrom
  • nps.gov