A limestone or chalk deposit from the Middle Triassic in Europe, especially in Germany.
- ‘In the Muschelkalk of Germany, the oldest known Pleuronectites have been found in the Upper Terebratelbank of middle Pelsonian age.’
- ‘The Triassic record is represented by the Germanic facies: Buntsandstein, Muschelkalk and Kouper.’
- ‘He said that it is especially characteristic of the Upper Triassic, including the Rhaetian, but is possibly absent from the German Muschelkalk and is unknown from the pre-Ladinian Alpine beds.’
- ‘The New Pass specimens are more equilateral and equivalved than any specimens of Pleuronectites laevigatus observed from the Muschelkalk of Germany.’
- ‘In addition, some species described as ‘Mytilus’ from the European Muschelkalk may prove to be members of this genus.’
Mid 19th century: from German, literally mussel chalk.