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9-862: The Exter Formation is the only formation of the Upper Keuper or Rhätsandstein, and is a geologic formation in Germany . It preserves fossils dating back to the Rhaetian of the Triassic period (specifically around 205 Ma). The formation has provided fossils of: Keuper The Keuper together with the Muschelkalk and the Buntsandstein form the Germanic Trias Group , a characteristic sequence of rock strata that gave

18-750: A formally recognised geological division. The one-time Keuper Marls are now redesignated as the Mercia Mudstone Group . The underlying Keuper Sandstone is now the Helsby Sandstone Formation at the top of the Sherwood Sandstone Group . Traditionally it contained the following subdivisions: The Keuper covers a large area in the Midlands and around the flanks of the Pennine range; it reaches southward to

27-434: A partial skull from the earliest Upper Triassic of Bavaria, Germany. Numerous other species were referred to Capitosaurus before the 1920s, but through much of the 20th century most authors considered the original specimen of C. arenaceus to be undiagnostic, effectively invalidating the genus and leading to the referral of all species but the type to other genera. However, Rainer Schoch had suggested in his 2008 revision of

36-747: Is associated with gypsum, is exploited in south Germany at Dreuze, Pettoncourt, as well as in Vie in the Lorraine region of France. A 4-metre (13 ft) coal is found on this horizon in the Ore Mountains on the border between Germany and the Czech Republic , and another, 2 metres thick (7 ft), has been mined in Upper Silesia , now in Poland . In Great Britain the 'Keuper' is no longer

45-687: The Triassic its name. The Upper Triassic is well exposed in Swabia , Franconia , Alsace and Lorraine and Luxembourg ; it extends from Basel on the east side of the Rhine into Hanover , and through England into Scotland and north-east Ireland ; it appears flanking the central plateau of France and in the Pyrenees and Sardinia . The Keuper sequence is linked by name to the Keuper Uplands area of southern Germany. In south Sweden ,

54-528: The early beetle Triamyxa is also known from the Keuper. Capitosaurus Capitosaurus is an extinct genus of temnospondyl from the Late Triassic of Germany. Its skull was 30 cm long, with a total length over 122 cm. It was one of the first temnospondyl genera to have been erected, with the type species , C. arenaceus , originally described by Münster in 1836 based on

63-511: The east Devon coast, northeastward into Yorkshire and northwestward into Northern Ireland and southernmost Scotland. The Keuper is not rich in fossils ; the principal plants are cypresslike conifers ( Walchia , Voltzia ) and a few calamites with such forms as Equisetum arenaceum and Pterophyllum jaegeri . Avicula contorta , Protocardium rhaeticum , Terebratula gregaria , Myophoria costata , M. goldfassi , Lingula tenuessima , and Anoplophoria lettica may be mentioned among

72-438: The invertebrates. The fish include Ceratodus , Hybodus and Lepidotus . Labyrinthodonts represented by the footprints of Cheirotherium and the bones of Mastodonsaurus (originally called Labyrinthodon ) and Capitosaurus . Among the reptiles are Hyperodapedon , Palaeosaurus , Zanclodon , Nothosaurus , Henodus and Belodon . The first fossil mammals also make their appearance at this time and

81-644: The lower portion contains coal -bearing strata, as in the Himalayas , Japan , Tibet , Burma , eastern Siberia and in Spitsbergen . The upper portion of the Karoo Supergroup of South Africa and part of the Otapiri stage of New Zealand are probably of Rhaetian age. In Germany and adjacent parts of western and central Europe, the Keuper unit is divided into three groups: The salt , which

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