Röt Formation Explained

Röt Formation
Type:	Formation
Age:	Anisian (Aegean or Bithynian) ~
Period:	Anisian
Prilithology:	Limestone, mudstone, shale
Otherlithology:	Sandstone
Region:	Sachsen-Anhalt, Baden-Württemberg, Bavaria, Hessen
Country:	Germany
Coordinates:	51.5°N 11.9°W
Paleocoordinates:	17.5°N 19.7°W
Unitof:	Buntsandstein
Subunits:	Violet Horizon 5 Member
Underlies:	Jena Formation
Overlies:	Plattensandstein & Solling Formations
Extent:	Central Germany

The Röt Formation or Rötton Formation (German for Röt Shale), or Upper Buntsandstein, is a geologic formation of the Buntsandstein in Germany. It preserves fossils dating back to the Middle Triassic Epoch (Anisian or Aegean or Bithynian in the regional stratigraphy).^[1] The formation overlies the Plattenstein and Solling Formations and is overlain by the Jena Formation.^{[2] [3]}

The limestones, mudstones, shales and sandstones of the formation, deposited in a shallow marine environment, have provided fossils of early archosaurs, temnospondyls, fish and insects.

Fossil content

The formation has provided the following fossils:^[1]

Group	Taxa	Notes	Images
Temnospondyls	Eocyclotosaurus woschmidti	align=center	^[4] ^[5]
	Heptasaurus cappelensis (described as Mastodonsaurus cappelensis)	align=center
		align=center	^[6]
Reptiles	Amotosaurus rotfeldensis	align=center	^[7]
	Anomoiodon krejcii	align=center
	Crenelosaurus nigrosilvanus	align=center
	Cymatosaurus erikae	align=center
	C. erytheus	align=center	^[8]
	C. fridericianus	align=center	^[9]
	Marcianosuchus angustifrons
	Sclerosaurus armatus	align=center	^[10]
	Seemannia palaeotriadica	align=center	^[11]
		align=center
		align=center
Insects	Rhoeniella granulata	align=center	^[12]

Correlations

Based on the fossils of early archosaurs, the formation is correlated with the Donguz Formation of Russia, the upper Heshanggou Formation of China and the Holbrook Member of the Moenkopi Formation of Arizona.^[3]

See also

• List of fossiliferous stratigraphic units in Germany
• Anisian formations
  • Besano Formation, fossiliferous formation of the Alps
  • Manda Formation, fossiliferous formation of Tanzania
  • Omingonde Formation, fossiliferous formation of Namibia

References

Bibliography

• Butler . R. J. . S. L. . Brusatte . M. . Reich . S. J. . Nesbitt . R. R. . Schoch . J. J. . Hornung . 2011 . The sail-backed reptile Ctenosauriscus from the latest Early Triassic of Germany and the timing and biogeography of the early archosaur radiation . . 6 . 10 . 1–28 . 10.1371/journal.pone.0025693 . 22022431 . 3194824 . 2011PLoSO...625693B . free .
• Sues . H.-D. . R. R. . Reisz . 53967912 . 2008 . Anatomy and Phylogenetic Relationships of Sclerosaurus armatus (Amniota: Parareptilia) from the Buntsandstein (Triassic) of Europe . . 28 . 4 . 1031–1042. 10.1671/0272-4634-28.4.1031 . 2008JVPal..28.1031S .
• Fraser . N. C. . O. . Rieppel . 2006 . A new protorosaur (Diapsida) from the Upper Buntsandstein of the Black Forest, Germany . . 26 . 4 . 866–871. 10.1671/0272-4634(2006)26[866:ANPDFT]2.0.CO;2 . 86244612 .
• Rieppel . O . 84238070 . 1999 . Variation of cranial characters in Cymatosaurus "gracilis" Schrammen 1899 (Reptilia, Sauropterygia), and its implications for systematics . . 73 . 3–4 . 369–375. 10.1007/BF02988047 .
• Schoch . R. R. . R. . Werneburg . 1999 . The Triassic labyrinthodonts from Germany . . 7-8 . 629–650.
• Ebel . K. . F. . Falkenstein . F.-O. . Haderer . R. . Wild . 1998 . Ctenosauriscus koeneni (v. Huene) und der Rauisuchier von Waldshut - Biomechanische Deutung der Wirbelsäule und Beziehungen zu Chirotherium sickleri Kaup . . 261 . 1–18.
• Rieppel . O . 1997 . Revision of the sauropterygian reptile genus Cymatosaurus v. Fritsch, 1894, and the relationships of Germanosaurus Nopcsa, 1928, from the Middle Triassic of Europe . . New Series . 36 . 1–36.
• Ansorge . J . 1994 . Rhoeniella granulata gen. et sp. nov. (Insecta: Hemiptera) aus dem Oberen Buntsandstein der Rhön (Hessen) . . 74 . 325–327.
• Ortlam . D . 1967 . Fossile Böden als Leithorizonte für die Gliederung des Höheren Buntsandsteins im nördlichen Schwarzwald und südlichen Odenwald . . 84 . 485–590.
• Von Huene . F . 1958 . Ein Pseudosuchier aus dem Buntsandstein des Schwarzwalds [A pseudosuchian from the Buntsandstein of the Black Forest] . . 113 . 111–112.

Notes and References

1. http://www.fossilworks.org/cgi-bin/bridge.pl?action=displayStrata&geological_group=Buntsandstein&formation=R%F6t&group_formation_member=R%F6t Röt Formation
2. Butler et al., 2011, p.2
3. Butler et al., 2011, p.25
4. Schoch & Werneburg, 1999
5. Fraser & Rieppel, 2006
6. Butler et al., 2011
7. Ortlam, 1967
8. Rieppel, 1997
9. Rieppel, 1999
10. Sues & Reisz, 2008
11. Von Huene, 1958
12. Ansorge, 1994