Letter P - Volcanology dictionary by Futura-Sciences

Alphabetical index

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 ...
Pyroclastic flow A pyroclastic surge is a relatively dense high temperature ...	Pyroclastic surge A pyroclastic surge is a large volume of burning gases at ...