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What type of plate boundary can produce large amount of rhyolitic lava?
Wiki User
∙ 13y ago
Not sure if there's a good answer for this question... but a subducting plate boundary is good for making volcanoes. The problem is that during subduction, there's an oceanic plate going under a continental plate. Oceanic plates are generally more mafic (more metallic stuff than rhyolite) than the continental plate. They get subducted, get hot and melt a little, and then head back up a little inland to make volcanoes. If they come up slow, I *think* they tend to pick up more chunks of the continental crust they're ascending through, making them more felsic (opposite of mafic.) Which could make your rhyolite lava.
But it doesn't work all the time... for example the Andes have been coughing up andesite (Andes-ite lol) for quite a while, which is of course not rhyolite.
Wiki User
∙ 13y ago
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