Tor Formation
Geological formation of Danian (lowermost Paleocene) age
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The Tor Formation is a geological formation of late Campanian to Maastrichtian (uppermost Cretaceous) age. It forms the part of the Chalk Group in the North Sea. It is an important reservoir for oil and gas in fields such as Valhall. It overlies the Hod Formation. It underlies the Rødvig and Ekofisk Formations with local evidence of unconformity.[1][2][3]
| Tor Formation | |
|---|---|
| Stratigraphic range: Late Cretaceous Late | |
| Type | Geological formation |
| Unit of | Chalk Group |
| Underlies | Rødvig Formation and Ekofisk Formation |
| Overlies | Hod Formation |
| Thickness | up to 472 metres (1,550 ft) |
| Lithology | |
| Primary | Chalk |
| Location | |
| Region | North Sea |
| Country | Denmark, Norway & United Kingdom |
| Type section | |
| Named for | Tor field |
| Location | Well 1/3-1. Norwegian sector |