A glacier is a large mass of ice that moves slowly over land. They are formed from accumulated snow that has compacted into ice over many years. Glaciers are a key indicator of climate change and have a significant impact on the Earth's landscape.
Glaciers form in areas where the accumulation of snow exceeds its melting and sublimation over many years. As the snow accumulates, it compresses into ice and forms a glacier. This process is known as glaciation.
There are two main types of glaciers: alpine glaciers and ice sheets. Alpine glaciers form in mountainous regions and move downslope through valleys, while ice sheets are large, continental-scale glaciers that cover vast areas of land.
Glaciers have a significant impact on the Earth's landscape. They can carve out valleys, create fjords, and deposit large amounts of sediments as they move. As glaciers melt, they contribute to rising sea levels and can affect global climate patterns.