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Volcanology
Alphabetical index
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Lava
Lava is rock from a magma released in more or less fluid ...
Lava dome
A lava dome is the result of a slow extrusion of viscous ...
Lava tube
A Lava tube forms when a volcanic flow cools at the surface, ...
Leucitite
Leucitite is volcanic rock under-saturated in silica ...
Leucocratic
Leucocratic refers to igneous rocks rich in light minerals ...
Maar
A Maar is a dish-shaped crater from an explosion, from a few ...
Magma
Magma is a Greek word meaning "paste". Hot plastic ...
Magma
Magma is molten rock that can solidify at depth or emerge as lava.
Magma chamber
A magma chamber is a reservoir of magma located under a ...
Mesostase
In volcanic rocks mesostase is vitreous or very finely ...
Metasomatose
Metasomatose is an extreme case of metamorphism accompanying ...
Microdiorite
Microdiorite is plutonic igneous rock with a micro-grained ...
Pegmatite
Pegmatite is igneous rock occurring in the form of seams or ...
Phonolite
Phonolite is volcanic rock under-saturated in silica ...
Pillow lavas
Pillow lavas are formed underwater. They take the shape of a ...
Plagioclasite
Plagioclasite is a synonym of anorthosite (q.v.).
Planèze
Planèze is a French term meaning a volcanic plateau.
Plinian spine
A Plinian spine is one of the two main explosive regimes, ...
Porphyric
Porphyric rocks are igneous rocks containing large crystals ...
Protrusion
A geological protrusion forms during a volcanic eruption ...
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