About: http://webisa.webdatacommons.org/8360977

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	When the concretions are worn out of the rock, there is a tendency for these to snap off at the concretion, leaving a small indentation.
http://www.w3.org/ns/prov#wasQuotedFrom	unmannedspaceflight.com