About: http://webisa.webdatacommons.org/21802925

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	The deposits vary widely in age and character, from Recent oyster and other shells being dredged from the bay in San Mateo County for making cement, to the limestones and dolomites believed to be the oldest rocks of the Coast Ranges.
http://www.w3.org/ns/prov#wasQuotedFrom	quarriesandbeyond.org