| Werkkalk Formation | |
| Type: | Formation |
| Age: | Jurassic Oxfordian (stage) |
| Prilithology: | Lime mudstone or marl |
| Country: | Bavaria, Germany |
| Coordinates: | 49.0° N, 11.3° E |
| Paleocoordinates: | 40.2° N, 19.5° E |
The Werkkalk Formation is a geologic formation in Germany. It preserves radiolarian fossils dating back to the Oxfordian Stage of the Late Jurassic Period. The fossils may be pyritised.[1]