| Eller Beck Formation | |
|---|---|
| Stratigraphic range: | |
| Type | Formation |
| Unit of | Ravenscar Group |
| Sub-units | Lower Member, Upper Member, Blowgill Member |
| Underlies | Cloughton Formation |
| Overlies | Saltwick Formation |
| Thickness | Typically 4.5 to 6 m, maximum of 8.2m |
| Lithology | |
| Primary | Sandstone, Mudstone |
| Other | Ironstone, Limestone |
| Location | |
| Region | Europe |
| Country |  UK |
| Extent | Yorkshire |
| Type section | |
| Named for | Eller Beck |
| Location | Walk Mill Foss |
The Eller Beck Formation is a geologic formation in England. It preserves fossils dating back to the Jurassic period. It consists of a lower unit less than 3 m thick consisting of mudstone with subordinate ironstone, with an upper unit typically 4–6 m thick consisting of fine-medium grained sandstone, further south it changes into finer grained facies with mudstone and limestone.