About: http://webisa.webdatacommons.org/175094397

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	Igneous rocks are also used for concrete aggregate, particularly where alternatives such as sand and gravel and limestone are absent.
http://www.w3.org/ns/prov#wasQuotedFrom	www.gov.scot