- GLOSSARY OF VOLCANIC TERMS
A type of explosive volcanic eruption that occurs when water (groundwater or surface water) comes in contact with hot magma. The quenching of the magma by the water causes the magma to violently fragment into juvenile (cognate) particles that are bounded by fracture surfaces and by rounded walls of broken vesicles. Due to the moisture present, accretionary lapilli are also common in volcanic deposits resulting from phreatomagmatic eruptions (Williams and McBirney, 1979, p. 247-248).
Glossary of volcanic terms. - University of Wisconsin Oshkosh. G. J. Hudak. 2001.
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Phreatomagmatic eruption — Phreatomagmatic eruptions are defined as juvenile forming eruptions as a result of interaction between water and magma. They are different from magmatic and phreatic eruptions. The products of phreatomagmatic eruptions contain juvenile clasts,… … Wikipedia
phreatomagmatic — adjective Describing a volcanic eruption caused by magma coming into contact with water … Wiktionary
phreatomagmatic — ALASKA VOLCANO OBSERVATORY GLOSSARY An explosive volcanic eruption that results from the interaction of surface or subsurface water and magma … Glossary of volcanic terms
phreatomagmatic — /ˌfriætoʊmægˈmætɪk/ (say .freeatohmag matik) adjective of, relating to, or designating a volcanic eruption in which water is mixed with magma … Australian English dictionary
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Subglacial eruption — A subglacial eruption is a volcanic eruption that has occurred under ice, or under a glacier. Subglacial eruptions can cause dangerous floods, lahars and create hyaloclastite and pillow lava. Only five of these types of eruptions have been… … Wikipedia
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