petrushkagoogol Posted June 29, 2016 Report Posted June 29, 2016 Is lava a colloidal plasma substrate ? (which emits fire (a plasma) at regular intervals as it flows). Quote
exchemist Posted July 9, 2016 Report Posted July 9, 2016 Is lava a colloidal plasma substrate ? (which emits fire (a plasma) at regular intervals as it flows). Nope. Next.....? Quote
petrushkagoogol Posted July 10, 2016 Author Report Posted July 10, 2016 Nope. Next.....? Then what exactly is it........... Quote
Moontanman Posted July 10, 2016 Report Posted July 10, 2016 (edited) Then what exactly is it........... Molten basalt containing bubbles of gas... More accurately it is molten basalt with gasses dissolved in the lava that fizz out when it comes to the surface and the pressure is released. Much like soda pop... Edited July 10, 2016 by Moontanman petrushkagoogol 1 Quote
exchemist Posted July 11, 2016 Report Posted July 11, 2016 Molten basalt containing bubbles of gas... More accurately it is molten basalt with gasses dissolved in the lava that fizz out when it comes to the surface and the pressure is released. Much like soda pop... This sounds like a description of pumice rather than lava. Lava is a much broader term and simply means rock extruded from a volcano that is hot enough to be fluid or semi-fluid. Basalt is one type of lava but there are many others too, such as andesite or rhyolite. And the amount of gas in lava varies very widely as well. For example in fluid lava of the type often extruded from Hawaiian volcanoes, there is almost no gas present. An example of the solid rock formed by cooling basalt with no gas in it is obsidian - a black glassy material, very different indeed from pumice. Quote
Moontanman Posted July 11, 2016 Report Posted July 11, 2016 This sounds like a description of pumice rather than lava. Lava is a much broader term and simply means rock extruded from a volcano that is hot enough to be fluid or semi-fluid. Basalt is one type of lava but there are many others too, such as andesite or rhyolite. And the amount of gas in lava varies very widely as well. For example in fluid lava of the type often extruded from Hawaiian volcanoes, there is almost no gas present. An example of the solid rock formed by cooling basalt with no gas in it is obsidian - a black glassy material, very different indeed from pumice. Lava can contain various amounts of volatile compounds as well as consist of various materials, until the pressure is relieved it is molten rock, just the way soda pop is a liquid until you release the pressure and it becomes foam.. Quote
exchemist Posted July 11, 2016 Report Posted July 11, 2016 (edited) Lava can contain various amounts of volatile compounds as well as consist of various materials, until the pressure is relieved it is molten rock, just the way soda pop is a liquid until you release the pressure and it becomes foam.. This is not true of lava in general. As I said before, plenty of lava has relatively little dissolved gas in it, in which case the "soda pop" analogy is irrelevant and confusing. The "soda pop" analogy is used to explain how pyroclastic flows form, i.e. by explosive release of pressure and consequent fragmentation of the lava into an expanding cloud of gas and particles. A lava flow just flows like a river of treacle (pahoehoe) or like a landslide of blocks of clinker (aa), with little or no evolution of gas. Forget the gas. It is not part of the explanation of a lava flow. More details here: https://en.wikipedia.org/wiki/Lava Edited July 12, 2016 by exchemist petrushkagoogol 1 Quote
Speedjohn Posted April 4, 2017 Report Posted April 4, 2017 Lava is made up of crystals,volcanic glass and bubbles.Chemically lava is made of the elements silicon, oxygen, aluminum, iron, magnesium, calcium, sodium, potassium, phosphorus, and titanium. petrushkagoogol 1 Quote
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