The Balder Formation is a geological formation of lowermost Eocene in age, found in the Central and Northern North Sea and Faroe-Shetland Basin. The formation is named after Balder, a god from Norse mythology. Layers of tuff are found, particularly at the base of the unit, deposited by airfall from volcanoes associated with the North Atlantic Igneous Province.
Stratigraphic range: Earliest Eocene
|Unit of||Moray Group|
|Underlies||Horda, Mousa or Tay Formation|
|Overlies||Sele or Dornoch Formation, Montrose Group|
|Thickness||30–300 m (98–984 ft)|
|Country|| United Kingdom|
|Extent||Central and northern North Sea, Faroe-Shetland Basin|
|Named for||Balder, Norse deity|
- British Geological Survey. "Balder Formation". The BGS Lexicon of Named Rock Units.
- Morton A.C.; Knox R.W.O'B. "Geochemistry of late Palaeocene and early Eocene tephras from the North Sea Basin" (PDF). Journal of the Geological Society, London. 147 (3): 425–437. doi:10.1144/gsjgs.147.3.0425.