Klerf Formation
The Klerf Formation is an Early Devonian (Emsian) formation that includes a Lagerstätte in the Northern Eifel hills, at Willwerath near Prüm, Rhineland-Palatinate, Germany. In it Jaekelopterus rhenaniae, a giant eurypterid was discovered. The Klerf Formation, comprising greenish and reddish shales, siltstones and sandstones, was first described in 1919 by Rudolf Richter (1881-1957) and reaches a maximum thickness of about 1,300 metres (4,300 ft).[1]
Klerf Formation Stratigraphic range: Emsian ~409–392 Ma | |
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Type | Geological formation |
Sub-units | Reifferscheid Mb. Altenberg Mb. Unterpreth Mb. |
Underlies | Heisdorf Formation |
Overlies | Schleiden Formation |
Thickness | 1,300 m (4,300 ft) |
Lithology | |
Primary | Siltstone, shale |
Other | Sandstone |
Location | |
Location | Eifel |
Coordinates | 50°14′48″N 06°27′21″W |
Region | Rhineland-Palatinate |
Country | Germany |
Type section | |
Named by | Richter |
Location | Willwerath near Prüm |
Year defined | 1919 |
Coordinates | 50°14′48″N 06°27′21″W |
Approximate paleocoordinates | 27.1°S 09.7°E |
Region | Eifel |
Country | Germany |
Avalonia with the Proto-Tethys Ocean (3) |
Depositional environment
The siltstone and sandstone formation was deposited in an estuarine to deltaic environment.[2] This was located on the edge of Avalonia bordering the Proto-Tethys Ocean.
Fossil content
Apart from the largest arthropod, Jaekelopterus (shown on the left), found in the formation, it also preserved the fish, bryozoa, brachiopod and ostracod remains,[1] the arachnids Devonotarbus hombachensis, Xenarachne willwerathensis,[2] and Mutationella indet. and flora.[3]
See also
- List of fossiliferous stratigraphic units in Europe
- Geology of Germany
- Floresta Formation
- Old Port Formation