Klerf Formation

From Wikipedia
Klerf Formation
Stratigraphic range: Emsian
~409–392  Ma
Type Geological formation
Sub-unitsReifferscheid Mb.
Altenberg Mb.
Unterpreth Mb.
Underlies Heisdorf Formation
Overlies Schleiden Formation
Thickness1,300 m (4,300 ft)
Primary Siltstone, shale
Other Sandstone
Location Eifel
Coordinates 50°14′48″N 06°27′21″W / 50.24667°N 6.45583°W / 50.24667; -6.45583
KLERF FORMATION Latitude and Longitude:

50°14′48″N 06°27′21″W / 50.24667°N 6.45583°W / 50.24667; -6.45583
Region Rhineland-Palatinate
Country  Germany
Type section
Named by Richter
Location Willwerath near Prüm
Year defined1919
Coordinates 50°14′48″N 06°27′21″W / 50.24667°N 6.45583°W / 50.24667; -6.45583
Approximate paleocoordinates 27°06′S 9°42′E / 27.1°S 09.7°E / -27.1; 09.7
Region Eifel
Country  Germany
Avalonia with the Proto-Tethys Ocean (3)

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]

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

Jaekelopterus Size 2.svg

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