What zone seals the base of a crevasse?

The zone that seals the base of a crevasse is known as the "crevasse floor" or "crevasse base." This area is typically composed of dense, compacted ice that has formed as a result of pressure and accumulation. The crevasse floor can be smooth or rough, depending on the ice's characteristics and the dynamics of the surrounding glacier. It plays a crucial role in the stability and evolution of the crevasse as the glacier continues to move.