22 relations: Agglomerate, Andesite, Breccia, Clay minerals, Diagenesis, Eutaxitic texture, Ignimbrite, Lapilli, Matrix (geology), Obsidian, Peralkaline rock, Porosity, Pumice, Pyroclastic flow, Rhyolite, Rock microstructure, Shear (geology), Tuff, Vesicular texture, Viscosity, Volcanic glass, Volcano.
Agglomerate
Agglomerate (from the Latin agglomerare meaning "to form into a ball") is a coarse accumulation of large blocks of volcanic material that contains at least 75% bombs.
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Andesite
Andesite is an extrusive igneous, volcanic rock, of intermediate composition, with aphanitic to porphyritic texture.
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Breccia
Breccia is a rock composed of broken fragments of minerals or rock cemented together by a fine-grained matrix that can be similar to or different from the composition of the fragments.
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Clay minerals
Clay minerals are hydrous aluminium phyllosilicates, sometimes with variable amounts of iron, magnesium, alkali metals, alkaline earths, and other cations found on or near some planetary surfaces.
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Diagenesis
Diagenesis is the change of sediments or existing sedimentary rocks into a different sedimentary rock during and after rock formation (lithification), at temperatures and pressures less than that required for the formation of metamorphic rocks.
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Eutaxitic texture
In igneous petrology, eutaxitic texture describes the layered or banded texture in some extrusive rock bodies.
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Ignimbrite
Ignimbrite is a variety of hardened tuff.
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Lapilli
Lapilli is a size classification term for tephra, which is material that falls out of the air during a volcanic eruption or during some meteorite impacts.
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Matrix (geology)
The matrix or groundmass of rock is the finer-grained mass of material wherein larger grains, crystals or clasts are embedded.
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Obsidian
Obsidian is a naturally occurring volcanic glass formed as an extrusive igneous rock.
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Peralkaline rock
Peralkaline rocks include those igneous rocks which have a deficiency of aluminium such that sodium and potassium are in excess of that needed for feldspar.
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Porosity
Porosity or void fraction is a measure of the void (i.e. "empty") spaces in a material, and is a fraction of the volume of voids over the total volume, between 0 and 1, or as a percentage between 0% and 100%.
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Pumice
Pumice, called pumicite in its powdered or dust form, is a volcanic rock that consists of highly vesicular rough textured volcanic glass, which may or may not contain crystals.
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Pyroclastic flow
A pyroclastic flow (also known as a pyroclastic density current or a pyroclastic cloud) is a fast-moving current of hot gas and volcanic matter (collectively known as tephra) that moves away from a volcano reaching speeds of up to.
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Rhyolite
Rhyolite is an igneous, volcanic rock, of felsic (silica-rich) composition (typically > 69% SiO2 – see the TAS classification).
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Rock microstructure
Rock microstructure includes the texture of a rock and the small scale rock structures.
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Shear (geology)
sinistral shear sense''', Starlight Pit, Fortnum Gold Mine, Western Australia Shear is the response of a rock to deformation usually by compressive stress and forms particular textures.
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Tuff
Tuff (from the Italian tufo) is a type of rock made of volcanic ash ejected from a vent during a volcanic eruption.
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Vesicular texture
Vesicular texture is a volcanic rock texture characterized by a rock being pitted with many cavities (known as vesicles) at its surface and inside.
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Viscosity
The viscosity of a fluid is the measure of its resistance to gradual deformation by shear stress or tensile stress.
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Volcanic glass
Volcanic glass is the amorphous (uncrystallized) product of rapidly cooling magma.
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Volcano
A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface.
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References
[1] https://en.wikipedia.org/wiki/Fiamme