12 Facts About Lava flow

Lava flow is molten or partially molten rock that has been expelled from the interior of a terrestrial planet or a moon onto its surface.

Lava flow is an outpouring of lava during an effusive eruption.

Lava flow viscosity is mostly determined by composition but depends on temperature and shear rate.

Lava flow viscosity determines the kind of volcanic activity that takes place when the lava is erupted.

Lava flow speeds vary based primarily on viscosity and slope.

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Lava flow is most fluid when first erupted, becoming much more viscous as its temperature drops.

The irregular upper part of the solidified Lava flow is called the entablature, while the lower part that shows columnar jointing is called the colonnade.

Lava flow domes are formed by the extrusion of viscous felsic magma.

When this flow occurs over a prolonged period of time the lava conduit can form a tunnel-like aperture or lava tube, which can conduct molten rock many kilometres from the vent without cooling appreciably.

Lava flow tubes are known from the modern day eruptions of Kilauea, and significant, extensive and open lava tubes of Tertiary age are known from North Queensland, Australia, some extending for 15 kilometres .

Lava flow deltas are generally associated with large-scale, effusive type basaltic volcanism.

Lava flow fountain is a volcanic phenomenon in which lava is forcefully but non-explosively ejected from a crater, vent, or fissure.