| Grabenbach Formation | |
|---|---|
| Stratigraphic range: Santonian | |
| Type | Formation |
| Unit of | Gosau Group |
| Underlies | Hochmoos Formation |
| Overlies | Streiteck Formation, Noth Formation |
| Lithology | |
| Primary | Shale |
| Location | |
| Region | Central Europe |
| Country | Austria |
The Grabenbach Formation is a geologic formation in Austria. It preserves fossils dated to the Santonian of the Cretaceous period.