Glacial lake

A glacial lake is a body of water with origins from glacier activity. They are formed when a glacier erodes the land, and then melts, filling the depression created by the glacier.One of the Valyavishki Lakes and Gazey Summit, Pirin Mountain, BulgariaIbón de Sabocos, in the Tena Valley, Spain. 'Ibón' is the local word in Aragonese for glacial lakes.Jökulsárlón, a glacial lake in Iceland. To the right, the mouth of the glacier Vatnajökull.The glacial lakes, that give origin to the Maritsa river, seen from Musala, Rila Mountain, BulgariaLaminated claystone from Glacial Lake Missoula, Montana.Saif-ul-Malook Lake in Kaghan Valley, PakistanOne of the Samodivski Lakes, Pirin Mountain, Bulgariacenter A glacial lake is a body of water with origins from glacier activity. They are formed when a glacier erodes the land, and then melts, filling the depression created by the glacier. Near the end of the last glacial period, roughly 10,000 years ago, glaciers began to retreat. A retreating glacier often left behind large deposits of ice in hollows between drumlins or hills. As the ice age ended, these melted to create lakes. This is apparent in the Lake District in Northwestern England where post-glacial sediments are normally between 4 and 6 metres deep. These lakes are often surrounded by drumlins, along with other evidence of the glacier such as moraines, eskers and erosional features such as striations and chatter marks. These lakes are clearly visible in aerial photos of landforms in regions that were glaciated during the last ice age. The coastlines near these areas are typically very irregular, reflecting the same geological process.