Figure 1

International Glaciospeleological Survey

Figure 1. A view into the crater from the north in summer 1998. Firn reaches around both sides of the Lava Dome (center). Avalanche debris falls from the far crater walls onto the ice mass and becomes incorporated into it. Calcite deposits form in streams rising from thermal springs on the crater flats. Debris flows below the dome can form in the unstable, loose crater floor (center foreground).


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