Röt Formation
{{Infobox rockunit
| name = Röt Formation
| image = Stratigraphic and geographical data for German ctenosauriscid specimens.png
| caption = Stratigraphy and extent of the Triassic in Germany
| type = Formation
| age = Anisian
(Aegean or Bithynian)
~{{fossil range|247|242}}
| period = Anisian
| prilithology = Limestone, mudstone, shale
| otherlithology = Sandstone
| namedfor =
| namedby =
| region = Sachsen-Anhalt, Baden-Württemberg, Bavaria, Hessen
| country = Germany
| coordinates = {{coord|51.5|N|11.9|E|display=inline,title}}
| paleocoordinates = {{coord|17.5|N|19.7|E|display=inline}}
| unitof = Buntsandstein
| subunits = Violet Horizon 5 Member
| underlies = Jena Formation
| overlies = Plattensandstein & Solling Formations
| thickness =
| extent = Central Germany
| area =
| map = {{Location map+ | Germany
| relief = 1
| width = 250
| float = center
| places =
{{Location map~ | Germany
| lat_deg = 51.5
| lon_deg = 11.9
| mark = Pink ff0080 pog.svg
| marksize = 12
}}
}}
| map_caption =
}}
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).[https://paleobiodb.org/classic/displayStrata?geological_group=Buntsandstein&formation=R%F6t&group_formation_member=R%F6t Röt Formation] at Fossilworks.org The formation overlies the Plattenstein and Solling Formations and is overlain by the Jena Formation.Butler et al., 2011, p.2Butler et al., 2011, p.25
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:
| class="wikitable sortable"
! Group !! Taxa !! Notes !! Images | |||
| rowspan=3 | Temnospondyls | Eocyclotosaurus woschmidti | align=center | Schoch & Werneburg, 1999Fraser & Rieppel, 2006 | File:Eocyclotosaurus_wellesi1DB.jpg |
| Heptasaurus cappelensis (described as Mastodonsaurus cappelensis) | align=center | | File:Heptasaurus_kappelensis.jpg | |
| Capitosauria indet. | align=center | Butler et al., 2011 | ||
| rowspan="10" | Reptiles | Amotosaurus rotfeldensis | align=center | Ortlam, 1967 | File:Amotosaurus_rotfeldensis_holotype.jpg |
| Anomoiodon krejcii | align=center | | ||
| Crenelosaurus nigrosilvanus | align=center | | ||
| Cymatosaurus erikae | align=center | | rowspan=3 | | |
| C. erytheus | align=center | Rieppel, 1997 | ||
| C. fridericianus | align=center | Rieppel, 1999 | ||
| Marcianosuchus angustifrons
| | | |||
| Sclerosaurus armatus | align=center | Sues & Reisz, 2008 | File:Sclerosaurus1DB.jpg | |
| Seemannia palaeotriadica | align=center | Von Huene, 1958 | ||
| Ctenosauriscidae indet. | align=center | | ||
| Fish | Selachii indet. | align=center | | |
| Insects | Rhoeniella granulata | align=center | Ansorge, 1994 |
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.
File:Early Triassic paleogeography and distribution of the earliest archosaurs.png|Paleogeography of the Early Triassic with archosaur fossil finds
File:Early Triassic stratigraphic distribution of the earliest archosaurs.png|Early Triassic formations with archosaur fossil finds
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
{{reflist|3}}
= Bibliography =
- {{cite journal |last1=Butler |first1=R. J. |first2=S. L. |last2=Brusatte |first3=M. |last3=Reich |first4=S. J. |last4=Nesbitt |first5=R. R. |last5=Schoch |first6=J. J. |last6=Hornung |year=2011 |title=The sail-backed reptile Ctenosauriscus from the latest Early Triassic of Germany and the timing and biogeography of the early archosaur radiation |journal=PLOS ONE |volume=6 |issue=10 |pages=1–28 |doi=10.1371/journal.pone.0025693 |pmid=22022431 |pmc=3194824 |bibcode=2011PLoSO...625693B |doi-access=free }}
- {{cite journal |last1=Sues |first1=H.-D. |first2=R. R. |last2=Reisz |s2cid=53967912 |year=2008 |title=Anatomy and Phylogenetic Relationships of Sclerosaurus armatus (Amniota: Parareptilia) from the Buntsandstein (Triassic) of Europe |journal=Journal of Vertebrate Paleontology |volume=28 |issue=4 |pages=1031–1042|doi=10.1671/0272-4634-28.4.1031 |bibcode=2008JVPal..28.1031S }}
- {{cite journal |last1=Fraser |first1=N. C. |first2=O. |last2=Rieppel |year=2006 |title=A new protorosaur (Diapsida) from the Upper Buntsandstein of the Black Forest, Germany |journal=Journal of Vertebrate Paleontology |volume=26 |issue=4 |pages=866–871|doi=10.1671/0272-4634(2006)26[866:ANPDFT]2.0.CO;2 |s2cid=86244612 }}
- {{cite journal |last=Rieppel |first=O |s2cid=84238070 |year=1999 |title=Variation of cranial characters in Cymatosaurus "gracilis" Schrammen 1899 (Reptilia, Sauropterygia), and its implications for systematics |journal=Paläontologische Zeitschrift |volume=73 |issue=3–4 |pages=369–375|doi=10.1007/BF02988047 }}
- {{cite journal |last1=Schoch |first1=R. R. |first2=R. |last2=Werneburg |year=1999 |title=The Triassic labyrinthodonts from Germany |journal=Zentralblatt für Geologie und Paläontologie, Teil I |volume=7-8 |pages=629–650}}
- {{cite journal |last1=Ebel |first1=K. |first2=F. |last2=Falkenstein |first3=F.-O. |last3=Haderer |first4=R. |last4=Wild |year=1998 |title=Ctenosauriscus koeneni (v. Huene) und der Rauisuchier von Waldshut - Biomechanische Deutung der Wirbelsäule und Beziehungen zu Chirotherium sickleri Kaup |journal=Stuttgarter Beiträge zur Naturkunde, Serie B |volume=261 |pages=1–18}}
- {{cite journal |last=Rieppel |first=O |year=1997 |title=Revision of the sauropterygian reptile genus Cymatosaurus v. Fritsch, 1894, and the relationships of Germanosaurus Nopcsa, 1928, from the Middle Triassic of Europe |journal=Fieldiana: Geology |series=New Series |volume=36 |pages=1–36}}
- {{cite journal |last=Ansorge |first=J |year=1994 |title=Rhoeniella granulata gen. et sp. nov. (Insecta: Hemiptera) aus dem Oberen Buntsandstein der Rhön (Hessen) |journal=Senckenbergiana Lethaea |volume=74 |pages=325–327}}
- {{cite journal |last=Ortlam |first=D |year=1967 |title=Fossile Böden als Leithorizonte für die Gliederung des Höheren Buntsandsteins im nördlichen Schwarzwald und südlichen Odenwald |journal=Geologisches Jahrbuch |volume=84 |pages=485–590}}
- {{cite journal |last=Von Huene |first=F |year=1958 |title=Ein Pseudosuchier aus dem Buntsandstein des Schwarzwalds [A pseudosuchian from the Buntsandstein of the Black Forest] |journal=Jahreshefte des Vereins für Vaterländische Naturkunde in Württemberg |volume=113 |pages=111–112}}
{{DEFAULTSORT:Rot Formation}}
Category:Triassic System of Europe
Category:Shallow marine deposits