释义 |
pyroclastic /ˌpʌɪrə(ʊ)ˈklastɪk /Geology adjectiveRelating to, consisting of, or denoting fragments of rock erupted by a volcano: pyroclastic material...- In practice pyroclastic and volcaniclastic rocks include all the products of extrusive volcanic activity except lava flows.
- Samples of pyroclastic rocks were examined in thin section.
- Erosion of old lava dome complexes has resulted in deep valleys that dissect pyroclastic and volcanoclastic fans.
plural noun ( pyroclastics) Pyroclastic fragments: the eruption of lavas and pyroclastics...- Voluminous quantities of Late Ordovician to Wenlockian felsic pyroclastics and lava flows record the extensive volcanism associated with the collision and deformation.
Derivatives pyroclast /ˈpʌɪrə(ʊ)klast / noun ...- Eruption at the surface then yields initial tephrite, typically erupted as pyroclasts.
- These fluids altered and metasomatized the previously emplaced volcanic products (lavas, pyroclasts).
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