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Data sets Publications Expeditions Thesaurus
volcanic rocks  search
BTigneous rocks
 .volcanic rocks
NTandesites
 basalts
 benmoreite
 dacites
 glasses
 granophyre
 melilitite
 phonolites
 pyroclastics
 rhyodacites
 rhyolites
 trachyandesites
 trachytes
UFeruptive rocks
 volcanics
RTlava
 volcanism
 rocks
 volcanoes
 shirasu
 volcanic ash
 volcanology
 ash flows
 pyroclastic flows
 breccia pipes
 diorite porphyry
 volcanic fields
 metavolcanic rocks
SNBefore 1978, also search igneous rocks AND volcanic. From 1978-1980, diorite porphyry was a narrower term. From 1981-1993, vitrophyre was a narrower term. From 1981-1985, volcanic ash and ash flows were narrower terms.