| Agardhfjellet Formation | |
|---|---|
| Stratigraphic range: Oxfordian-Berriasian ~ | |
 Geologic map of central Svalbard with the formation in dark blue | |
| Type | Formation |
| Unit of | Adventdalen Group |
| Sub-units | Oppdalsåta & Slottsmøya Members |
| Underlies | Rurikfjellet Formation |
| Overlies | Knorringfjellet Formation |
| Lithology | |
| Primary | Mudstone |
| Other | Dolomite |
| Location | |
| Coordinates | 78°18′N 15°48′E / 78.3°N 15.8°E |
| Approximate paleocoordinates | 69°36′N 16°18′E / 69.6°N 16.3°E |
| Region | Svalbard |
| Country |  Norway |
| Extent | Central Spitsbergen Basin |
The Agardhfjellet Formation is a geologic formation in Svalbard, Norway. It preserves fossils dating back to the Oxfordian to Berriasian stages, spanning the Late Jurassic-Early Cretaceous boundary.[1] The formation contains the Slottsmøya Member, a highly fossiliferous unit (Lagerstätte) where many ichthyosaur and plesiosaur fossils have been found, as well as abundant and well preserved fossils of invertebrates.[2][3]
- ^ Connors, Marisa Leigh (2017). Deciphering the Late Jurassic paleoenvironment through Re-Os isotope geochemistry of the Agardhfjellet Formation, Svalbard (Thesis). Colorado State University.
- ^ Delsett et al., 2019, p.741
- ^ Agardhfjellet Formation at Fossilworks.org