In the mountains of western North America, montane glaciers that had completely melted reformed shortly before 5000 BP. The most severe part of the best documented neoglacial period, especially in Europe and the North Atlantic,  is termed the "Little Ice Age".
Glaciers in the western mountains of North America partially melted around 5000 years ago, only to reform again. This was a particularly harsh period, known as the "Little Ice Age", which affected Europe and the North Atlantic.