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NOW WHAT? • Re: No. 5163: Magic magma

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There are several classic D&D adventures with pools or lakes of lava that act as dungeon exploration hazards. In reality, you'd notice the temperature getting too hot to be comfortable way before you got close enough to the lava for it to be dangerous.
Y'know…hmm. Another thing about lava as it's popularly portrayed is that it never loses heat, cools off, and hardens. Whereas, what strikes me upon looking at the occasional lava lake in Kīlauea is that even in a giant lake of lava it forms a thin crust of solid rock on its surface, because compared to it the air temperature is so cold that its surface freezes. And that's with a more-or-less straight connection down into the mantle! Any isolated pool of lava cut off from a heat source should have a solid crust that grows over time as the heat leaks away.

This together suggests a two-for-one explanation: people don't feel convective heat from lava pools because they're enchanted not to transfer heat with their surroundings, which explains how they can persist as hot liquid rock indefinitely rather than rapidly freezing out.
My general comment on lava is that real lava is dense, viscus, and a lousy conductor of heat. If you can breathe the air near it, then you can walk on it and your shoes will protect you.

Last time I looked I found two references on line to someone falling onto lava, both of them got back up and walked away. Allegedly you can see the badly singed coat one of them was wearing at the time at a park in Hawaii.

Lava in movies is almost always WATER, with red color added either by dye or more often by the special effects department later.

Statistics: Posted by Doug Lampert — 28 Mar 2024 17:23



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