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Loch Ness is  the largest lake in [[Great Britain]]. It is 23 miles long, one mile wide, and almost 900 feet deep in places thus making a full search of the lake unfeasible. The present day Loch Ness is about 10,000 years old and dates from the end of the last [[Ice Age]] (which lasted more than 20,000 years). During that age, the Great Glen was occupied by a huge glacier which filled the valley above the level of the present watershed, and extended into the Moray Firth. This glacier found the shattered along the fault easy to erode, which accounts for the great depth of Loch Ness to 600 feet  below sea-level. The underwater perimeter of the lake is glacially smoothed and very steep. Above Foyers Bay at the deepest section, there is 500 feet of water only 60 feet out from the bank.

Loch Ness is  the largest lake in [[Great Britain]]. It is 23 miles long, one mile wide, and almost 900 feet deep in places thus making a full search of the lake unfeasible. The present day Loch Ness is about 10,000 years old and dates from the end of the last [[Ice Age]] (which lasted more than 20,000 years). During that age, the Great Glen was occupied by a huge glacier which filled the valley above the level of the present watershed, and extended into the Moray Firth. This glacier found the shattered along the fault easy to erode, which accounts for the great depth of Loch Ness to 600 feet  below sea-level. The underwater perimeter of the lake is glacially smoothed and very steep. Above Foyers Bay at the deepest section, there is 500 feet of water only 60 feet out from the bank.