Both pillow lava and pahoehoe lava have about the same composition and harden into a kind of rock called basalt.
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No. Pillow lava is basaltic, so it has a low silica content.
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Pillow lava got it's name by the it looks. It looks like
pillows.
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No. Pillow lava is basaltic, low-viscosity lava. Krakatoa is a
stratovolcano with a style of ereuption more characteristic of
high-viscosity andesitic lava.