Definition of phreatomagmatic in English:
phreatomagmatic
adjective frɪˌatə(ʊ)maɡˈmatɪkfrēˌadəmaɡˈmadik
Geology (of a volcanic eruption) in which both magmatic gases and steam from groundwater are expelled.
Example sentencesExamples
- A similar degree of compositional variation between pyroclast glasses of phreatomagmatic pyroclastic rocks and intruding dykes has been recognized from the vent remnant of Szigliget, western Hungary.
- These are commonly present as pyroclastic deposits rather than lava because their early arrival favours interaction with groundwater to produce phreatomagmatic eruptions, and/or because they have higher volatile contents.
- After 1 August phreatomagmatic activity resumed and continued at a gradually diminishing rate until 5 August.
- These rafts were originally surface phreatomagmatic deposits, which were probably wet when they slumped into the vent complex.
- Mud and sand volcanoes are positive topographic features that have many of the aspects of normal phreatomagmatic volcanism resulting from explosive interaction between hot magma and water.
Origin
1960s: from Greek phrear, phreat- ‘a well’ + magmatic (see magma).
Definition of phreatomagmatic in US English:
phreatomagmatic
adjectivefrēˌadəmaɡˈmadik
Geology (of a volcanic eruption) in which both magmatic gases and steam from groundwater are expelled.
Example sentencesExamples
- These are commonly present as pyroclastic deposits rather than lava because their early arrival favours interaction with groundwater to produce phreatomagmatic eruptions, and/or because they have higher volatile contents.
- A similar degree of compositional variation between pyroclast glasses of phreatomagmatic pyroclastic rocks and intruding dykes has been recognized from the vent remnant of Szigliget, western Hungary.
- After 1 August phreatomagmatic activity resumed and continued at a gradually diminishing rate until 5 August.
- These rafts were originally surface phreatomagmatic deposits, which were probably wet when they slumped into the vent complex.
- Mud and sand volcanoes are positive topographic features that have many of the aspects of normal phreatomagmatic volcanism resulting from explosive interaction between hot magma and water.
Origin
1960s: from Greek phrear, phreat- ‘a well’ + magmatic (see magma).