| Harrylock Formation | |
|---|---|
| Stratigraphic range: Devonian | |
| Type | Formation | 
| Location | |
| Country | Ireland | 
The Harrylock Formation is a geologic formation in Ireland. It preserves fossils dating back to the Devonian period.
Color key
  | Notes Uncertain or tentative taxa are in small text;  | 
| Plants of the Harrylock Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Location | Stratigraphic position | Material | Notes | Images | 
| Callixylon [1] | C. seamrogia | A progymnosperm tree | ||||