| Eller Beck Formation | |
| Type: | Formation |
| Period: | Aalenian |
| Prilithology: | Sandstone, Mudstone |
| Otherlithology: | Ironstone, Limestone |
| Namedfor: | Eller Beck |
| Region: | Europe |
| Unitof: | Ravenscar Group |
| Subunits: | Lower Member, Upper Member, Blowgill Member |
| Underlies: | Cloughton Formation |
| Overlies: | Saltwick Formation |
| Thickness: | Typically 4.5 to 6 m, maximum of 8.2m |
| Extent: | Yorkshire |
| Location Ts: | 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.