Novarupta Dome, an almost perfectly circular mass of rhyolite lava, was emplaced at the Novarupta vent site in the weeks to months following the explosive eruption of June 6-9, 1912. The dome is roughly 500 m across and sits in the nearly 2-km-wide vent crater. The rubbly texture is characteristic of silicic lava domes.
Image courtesy of AVO / U.S. Geological Survey.
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