What is "boelling"

Bølling can refer to:

• Bølling lake, Denmark - a shallow lake in central Jutland, after which the following are named:
• The Bølling Oscillation or Interstadial - a warm phase during the last phase of the Weichsel glaciation in Europe; often referred to as a part of the Bølling-Allerød period, which includes the Older Dryas stadial between them.
• The Bølling Phase - a biostratigraphic subdivision during the early post-glacial period in Europe