Meltwater's the water released by the melting of snow or ice, including glacial ice and ice shelfs over oceans. Meltwater's often found in the ablation zone of glaciers, where the rate of snow cover's reducing. Meltwater can be produced during volcanic eruptions, in a similar way in which the more dangerous lahars form. When meltwater pools on the surface rather than flowing, it forms melt ponds. As the weather gets colder meltwater will often re-freeze. Meltwater can collect or melt under the… (More on Meltwater)