Stóra-Björnsfell

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Stóra-Björnsfell is an elongated medum-sized tuya located in Iceland. It contains pillow lava, hyaloclastite and steet lava. The volcano formed when a subglacial eruption occurred beneath an ice sheet during the last ice age. Stóra-Björnsfell's pillow lava appears originally to have erupted from a fissure.^{[citation needed]}