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A lava tube, or pyroduct, [1] is a natural conduit formed by flowing lava from a volcanic vent that moves beneath the hardened surface of a lava flow. If lava in the tube empties, it will leave a cave .
A lava tube, more rarely called a pyroduct, [1] is a 'roofed conduit through which molten lava travels away from its vent'. [2] If lava in the tube drains out, it will leave an empty cave . Lava tubes are common in low- viscosity volcanic systems.
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Volcanic pipes or volcanic conduits are subterranean geological structures formed by the violent, supersonic eruption of deep-origin volcanoes. They are considered to be a type of diatreme . Volcanic pipes are composed of a deep, narrow cone of solidified magma (described as "carrot-shaped"), and are usually largely composed of one of two ...
Correction: This story has been updated to correct the name of George W. Bush's spouse. President Donald Trump took the oath of office for a second time Monday, becoming the 47th president in ...
Another common small-scale feature of flood basalts is pipe-stem vesicles. Flood basalt lava cools quite slowly, so that dissolved gases in the lava have time to come out of solution as bubbles (vesicles) that float to the top of the flow. Most of the rest of the flow is massive and free of vesicles.
Lava tubes are the most common and extensive type of lava cave. Lava tubes usually form in pahoehoe lava flows, though exceptions exist. As the lava is emitted from the vent area, it spreads in the path of least resistance. The outer layers of the lava harden, while the interior forms horizontal conduits that channel the advance of the flow.
Lava tubes are caves which are formed in volcanic rock. They are usually the voids left when the molten lava cools and contracts. Pages in category "Lava tubes" The ...
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