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Hot ash flows are fascinating. Driven by expanding gas, they are really clouds of hot glass shards and pumice plus expanding gas whose turbulence keeps everything flowing like water. But as the gas escapes, the viscosity increases, motion ceases, and the ash settles into a layer more than one hundred feet thick. This deposit is still extremely hot, and as it compresses under its own weight, the sticky glass shards fuse into a welded tuff. The upper part of the ash cools too rapidly to weld and is either unconsolidated or weakly cemented by vapors of escaping gas.
Originally posted by BigfootNZ
Hmm interestingly, here in New Zealand we've had international air flights canceled due to all this since it started and the last two nights have been what id class as 'Real Cold' sure its winter here and winter in my area is pretty damn cold without getting anything like snow but last night was noticeably colder than the last few days and most nights since winter started and today its really really crisp (it is overcast today and last night was crystal clear so that might account for it, although we've had similar days in the last few weeks and it was not at all this cold).
Up until this volcano going off it was quite a mild winter, I wonder if even a minor amount of ash particles in the atmosphere make a rather noticeable temperature drop. To soon to tell, but it doesnt seem as it should be to me personally.
I dont see how this could effect the entire world though, since I thought the earth had rather distinct north and south regions concerning weather the ash at most will stick around covering the southern hemisphere.
Originally posted by Solsthime331
reply to post by N1thNa1ath
i dont think its that bad, the WORST i could see hapening with my knowlage of geology is that a plate will eventualy slide under the volcanoe if it gets that bad, just making a big lava wave and a new Yellowstone park but most likely 3x the size.
Originally posted by N1thNa1ath
reply to post by ZIPMATT
We are both in Argentina, i am in Buenos Aires and Drakus apparently in La Plata, in Buenos Aires Capital.
Puyehue began throwing magma to the sorroundings of the volcano, so we have to see what happens.
What I posted about the statement made by Enrique Valdivieso, the Chilean expert from the National Service for Geology and Minning of Chile, came true.
The volcano began throwing magma, i still can´t see the dimension of the problem.
Let´s see what happensedit on 21-6-2011 by N1thNa1ath because: (no reason given)