About: http://webisa.webdatacommons.org/383533787

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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	The ores are principally sulphides, although carbonates and oxides...Appears in 6 books from 1888-1916MorePage 132 - ... by old shafts of shallow depth, which mark the many prospecting efforts of former periods.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com