psusi Posted December 27, 2019 Share Posted December 27, 2019 It says it turns to magma at 2726, but magma turns to rock gas at 2356, so... that means obsidian does not melt, but sublimates directly to rock gas? Link to comment Share on other sites More sharing options...
whodunit Posted December 28, 2019 Share Posted December 28, 2019 it turns to magma but simultaneously converts to rock gas. you can observe the same behavior in sandstone. It turns to magma at 926c but turns to igneous rock instantly after that. Link to comment Share on other sites More sharing options...
psusi Posted December 29, 2019 Author Share Posted December 29, 2019 18 hours ago, whodunit said: it turns to magma but simultaneously converts to rock gas. you can observe the same behavior in sandstone. It turns to magma at 926c but turns to igneous rock instantly after that. Wait, what? I thought that regolith and other stone that had a melting point less than 1410 had their temperature turned up to 1410 when melted so that they would not instantly re-solidify into igneous? Link to comment Share on other sites More sharing options...
whodunit Posted December 29, 2019 Share Posted December 29, 2019 4 hours ago, psusi said: Wait, what? I thought that regolith and other stone that had a melting point less than 1410 had their temperature turned up to 1410 when melted so that they would not instantly re-solidify into igneous? Could be. I had some sandstone tiles in a metal volcano and they turned into igneous rock after briefly turning into magma. Possibly, it does raise their temp to 1410 and the surrounding air cooled them down. But then this would be a huge heat creation method. Sandstone has a specific heat of 0.8 so if you heat one upto 926c which then turns into magma at 1410 at 1.0 specific heat? that would be a huge amount of heat. So I just assumed the magma created returns back to the 926c after creation. Link to comment Share on other sites More sharing options...
psusi Posted December 29, 2019 Author Share Posted December 29, 2019 12 hours ago, whodunit said: But then this would be a huge heat creation method. Sandstone has a specific heat of 0.8 so if you heat one upto 926c which then turns into magma at 1410 at 1.0 specific heat? that would be a huge amount of heat. So I just assumed the magma created returns back to the 926c after creation. That's the idea. Regolith and sedimetnary rock are even better. Link to comment Share on other sites More sharing options...
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