About: http://webisa.webdatacommons.org/60431175

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	Rhyolite is somewhat resistant to wind and water erosion, so other rock types embedded in it were worn down first, leaving the hardened ashen material behind in many cases.
http://www.w3.org/ns/prov#wasQuotedFrom	penobscotbaypress.com