About: http://webisa.webdatacommons.org/299367266

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	Metamorphic rock usually derived from fine-grained sedimentary rock such as shale.
http://www.w3.org/ns/prov#wasQuotedFrom	nps.gov