A half-mile ice cap means that the ice has accumulated at a rate of 8 meters per year since the last major eruption 99 years ago. That's equivalent to several dozen meters of snowfall per year.
I wonder if the caldera really gets that much snow, or if the last few eruptions were too small to melt all the ice in the caldera.
I would assume that since a caldera is usually shaped like a cup, there is some flow towards the center where it's deeper. I.e. like with water flowing into a lake, the glacier has a catchment area.
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I wonder if the caldera really gets that much snow, or if the last few eruptions were too small to melt all the ice in the caldera.