About: http://webisa.webdatacommons.org/281801536

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	Those layers are treasure troves of information about the environment that existed on Mars when they were laid down, and in the geologic eras after that when the rocks were affected by weathering and other processes.
http://www.w3.org/ns/prov#wasQuotedFrom	thespacewriter.com