division of Triassic Period

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  Ingeochronology: Completion of the Phanerozoic time scale

  …units, the Bunter Sandstone, the Muschelkalk Limestone, and the Keuper Marls and Clays, as constituting the Trias or Triassic System.

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  InTriassic Period

  …units: the Bunter [or Buntsandstein], Muschelkalk, and Keuper.) Alberti’s rock sequence, which became known as the “Germanic facies,” had many drawbacks as a standard for assigning relative ages to Triassic rocks from other regions of the world, and so for much of the 19th and 20th centuries Triassic stages were…

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