About: http://webisa.webdatacommons.org/181648212

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	It is composed primarily of fine ground particles of limestone, clay or shale, lime, sodium, potassium chlorides, sulphates, metal oxides, calcium silicates and other salts.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com