| Eday Group | |
|---|---|
| Stratigraphic range: Givetian (Devonian) | |
 Red Head at the north end of Eday. The lower and steeper part of the cliff is formed of Middle Eday Sandstone, whereas the upper less steep part is formed of Eday Marl | |
| Type | Group |
| Unit of | Old Red Sandstone Supergroup |
| Sub-units | Upper Eday Sandstone Formation, Eday Marl Formation, Middle Eday Sandstone Formation, Eday Flagstone Formation, Lower Eday Sandstone Formation, Hoy Sandstone Formation |
| Underlies | not overlain |
| Overlies | Caithness Flagstone Group |
| Thickness | over 2000 m |
| Lithology | |
| Primary | sandstone |
| Other | mudstone, siltstone, lava |
| Location | |
| Region | Orkney |
| Country | Scotland |
| Extent | Orkney Islands |
| Type section | |
| Named for | Eday |
The Eday Group is a Devonian lithostratigraphic group (a sequence of rock strata) in Orkney, northern Scotland.[1] The name is derived from the island of Eday where the strata are exposed in coastal cliffs.[2]
- ^ Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Retrieved 17 December 2021.
- ^ British Geological Survey. "Eday Group". BGS Lexicon of Named Rock Units. Retrieved 20 March 2022.