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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	VI. OTHER MATERIALS. Maar Beds.- One of the most interesting results of the geological survey was the discovery of potash and soda in some of the marls of the Chester group, in such quantities as to prove them valuable as fertilizers.
http://www.w3.org/ns/prov#wasQuotedFrom	uky.edu