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Subject Item
dbpedia:San_Juan_volcanic_field
rdfs:comment
The San Juan volcanic field, in southwestern Colorado, contains two phases of volcanism.The earlier volcanism is Oligocene in age, and consists of largely intermediate composition lavas and breccias. A few ash flow tuffs also constitute this phase of volcanism. It probably was related to subduction along the western margin of North America.The later volcanism is Miocene–Pliocene in age, and is basaltic in composition.
foaf:name
San Juan volcanic field
dbpedia-owl:locatedInArea
dbpedia:Colorado
dbpedia-owl:type
dbpedia:Volcanic_field