About: http://webisa.webdatacommons.org/217507916

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	So, here is an indication that water washed over the pieces, which also means that they were most likely deposited by the water.
http://www.w3.org/ns/prov#wasQuotedFrom	pbs.org