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934:. Journal of Petrology. 26: 694–725) states that the viscosity of komatiite is estimated to be between 0.1 and 10 Pa.s. (The paper quotes some experimental data points of 0.05 to 1.25 Pa.s at 1600 to 1800°C). This source reference article, which seems reliable to me, seems to contradict the claim in this Knowledge (XXG) article that komatiite lava had a
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There are far too many examples of lava from Hawaii, can we flease not have pictures from other volcanoes. I know its easy to see lava on Hawaii but that not excuse for having 9 of 13 pictures from Hawaii. If nobody complains I will start to globalize the pictures and put the "excess" pictures in a
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is extremely important in causing volcanoes associated with subduction zones. Attributing all melting to "geothermal energy" is misleading and does nothing to explain why volcanoes might occur in one place and not another. I suggest removing the line "The source of the heat that liquifies the rock
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No mention is made of the fact that both aa and pahoehoe are strictly high-iron lavas, which are much less viscous than high-silica lavas. Ideally I'd like to see a chart of the ferromagnesium silicate range (from ultramafic to ultrasilicic), identifying the ranges which produce each type of lava.
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The section on
Ultramafic Lava mentioning that lava at a temperature of 1600 °C can have a viscosity as low as that of water needs a citation. The other statements about viscosity like "100,000 times as viscous as water" could also be resolved by having tables or graphs with the viscosities of
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I have no issue with more pictures from around the world, but do remember that Hawaii is the place where several types and features of lava were originally defined. A'a and pahoehoe pictures should be from Hawaii because that is where the type examples are.
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Saying something is 100,000 times more viscous that water is a very poor explanation. Someone should change that (I can't) to state that "Basaltic lava has roughly the same viscosity as cold honey, and silicic lavas, like granite can be much thicker".
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23:10, 15 October 2009 (UTC) Well I guess I just screwed up. I added yet another. If members object by all means remove. It is in the hazard section. That would be me in the picture. I'm adding another on the
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is a dead link leading to an error page at the USGS website. After doing a little searching, I found what I believe to be the updated web address that the hyperlink was originally intended to re-direct to:
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Note sure about this, but in lava fountains it's worth noting that the 1783 laki eruption had probably the highest fountains on record
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within the earth is geothermal energy." and replacing with something like "Causes of melting vary by geologic/tectonic setting (see
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01:09, 7 December 2005 (UTC) And also adding the fact that when lava come out it turnes into lava from magma
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Also, the section 'composition of lavas' is not actually about the composition of lavas. It should be. --
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on
Knowledge (XXG). If you would like to participate, please visit the project page, where you can join
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until a consensus is reached, and readers of this page are welcome to contribute to the discussion.
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Seeing as its been years since there has been any vandalism, should the protection be removed now?
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for that content in the latter page, and it must not be deleted as long as the latter page exists.
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resource. If you would like to participate, you can choose to edit this article, or visit the
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Seems it was quite a target for vandalism and was semi'd last March. Check the history.
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Kilburn gives a komatiite viscosity of <1? Pa.s at an eruption temperature of : -->
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added a source reference citation for this statement. My understanding is that the
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Huppert, H. E.; Sparks, R.S.J. (1985). "Komatiites I: Eruption and Flow" (PDF)
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Wasn't that a long time ago, by the usual standards for such cases?
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Something like that would be good, although it will need a source.
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An editor has identified a potential problem with the redirect
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1600?°C on page 294 of
Sigurdsson, H. et al. (editors) (2000)
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Is there a reason for protecting this page from IP editors?
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Please spell "immisible" with a c, as in "immiscible "
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different lava types with respect to temperature. (
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