phreatomagmaticadj.

Brit.

/frɪˌatəʊmaɡˈmatɪk/, U.S.

/friˌædoʊˌmæɡˈmædɪk/

Origin: Formed within English, by compounding. Etymons: phreatic adj., -o- connective, magmatic adj.

Etymology: < phreat- (in phreatic adj.) + -o- connective + magmatic adj. Compare German phreatomagmatisch (1977 or earlier).

Geology.

Designating or relating to a volcanic eruption in which both steam from groundwater and an aerosol of magmatic gases and particles are expelled.

ΚΠ

1960 Prof. Papers U.S. Geol. Surv. No. 400 - b. 354/2 Large phreatomagmatic explosions..were the source for a widespread blanket of ash.

1983 Sci. Amer. Nov. 151/1 Phreatomagmatic eruptions..take place either when magma heats and cracks rock close to an underground water table or when sea-water somehow gains entry to the magma chamber.

1993 Jrnl. Petrol. 34 384 Most of the juvenile material erupted during the final phreatomagmatic phases originated from a conspicuous, crystal-enriched, gas-poor magma body already present at very shallow depth beneath the volcano when the eruption started.

This is a new entry (OED Third Edition, March 2006; most recently modified version published online March 2022).

单词	phreatomagmatic
释义	phreatomagmaticadj. Brit. /frɪˌatəʊmaɡˈmatɪk/, U.S. /friˌædoʊˌmæɡˈmædɪk/ Origin: Formed within English, by compounding. Etymons: phreatic adj., -o- connective, magmatic adj. Etymology: < phreat- (in phreatic adj.) + -o- connective + magmatic adj. Compare German phreatomagmatisch (1977 or earlier). Geology. Designating or relating to a volcanic eruption in which both steam from groundwater and an aerosol of magmatic gases and particles are expelled. ΚΠ 1960 Prof. Papers U.S. Geol. Surv. No. 400 - b. 354/2 Large phreatomagmatic explosions..were the source for a widespread blanket of ash. 1983 Sci. Amer. Nov. 151/1 Phreatomagmatic eruptions..take place either when magma heats and cracks rock close to an underground water table or when sea-water somehow gains entry to the magma chamber. 1993 Jrnl. Petrol. 34 384 Most of the juvenile material erupted during the final phreatomagmatic phases originated from a conspicuous, crystal-enriched, gas-poor magma body already present at very shallow depth beneath the volcano when the eruption started. This is a new entry (OED Third Edition, March 2006; most recently modified version published online March 2022). < adj.1960
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