Construct · 1 fields · 1 citations

phreatomagmatic: a standalone construct

One name. One construct. A landmark on the map.

● anchor · one field, one construct Nearest construct by meaning·not indexed
phreatomagmatic1 CONSTRUCTPhreatomagmaticSHERIDAN & WOHLETZ

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Volcanology

Explosive eruption driven by magma meeting water

A phreatomagmatic eruption is an explosive eruption driven by the interaction of rising magma with external water (groundwater, a lake, or the sea), in which rapid heat transfer flashes the water to steam and shatters the magma into fine fragments. Sheridan and Wohletz's 1983 review of hydrovolcanism set out how the ratio of water to magma controls the violence and the fine, often blocky, ash such eruptions produce. The referent is an eruption style defined by magma-water interaction, distinct from purely magmatic explosivity driven by the magma's own dissolved gas.[1]

Unit
The explosivity and fragmentation produced by magma–external-water interaction
Recovery means
Not applicable
Measured by
Diagnosed from fine, blocky ash morphology, water-to-magma ratio indicators, and base-surge and tuff-ring deposits

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Nearby constructs

eruption2 fields · 2 citationsjingle · one word, two constructsheat2 fields · 2 citationsjingle · one word, two constructsinteraction3 fields · 7 citationsjingle · one word, three constructs

References

  1. Sheridan, M. F., & Wohletz, K. H. (1983). Hydrovolcanism: Basic considerations and review. Journal of Volcanology and Geothermal Research, 17(1–4), 1–29. https://doi.org/10.1016/0377-0273(83)90060-4

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