All of that hummocky brown "dirt" behind the snout is actually a thick layer of lava rock that fell onto the glacier, riding the ice down into the valley.
We noticed a patch of lava rock (on the north face of the mountain) that seemed to be emitting steam – here is a closer shot of that area:
I have since learned that this is an active volcanic area, with fumaroles and steam vents. But the orange color is caused by the sunset hitting the steam -- this is not a volcanic eruption.
Those blossoms are less than two inches long, but they glowed like stained glass windows.