Glacial ice refers to the mass of ice that is formed by the accumulation and compaction of snow over many years or even centuries. This type of ice forms in glaciers, which are large bodies of ice that move slowly downhill due to their immense weight. Glacial ice can be found in various locations such as mountain ranges, polar regions, and high altitude areas where the temperature is consistently cold enough for snowfall to accumulate over time. The thickness of glacial ice varies depending on its age and location but it generally ranges from a few meters to several hundred meters deep. Glacial ice plays an important role in regulating global climate as it reflects sunlight back into space, helping to keep the planet cool.