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Updated: May 5, 2025
Upper Lias, argillaceous, with Ammonites striatulus. FOREIGN. Keuper beds of Germany. Cassian or Hallstadt beds, with rich marine fauna. BRITISH. Wanting. FOREIGN. Muschelkalk of Germany. BRITISH. Bunter or Lower New Red sandstone of Lancashire and Cheshire. FOREIGN. Bunter-sandstein of Germany. BRITISH. Upper Permian of St. Bees' Head, Cumberland. FOREIGN. Dark-coloured shales of Thuringia.
Bunter-sandstein: Gres bigarre: Sandstone and quartzose conglomerate. Equisetites columnaris. The first of these, or the Keuper, underlying the beds before described as Rhaetic, attains in Wurtemberg a thickness of about 1000 feet. It is divided by Alberti into sandstone, gypsum, and carbonaceous clay-slate.
The Bunter-sandstein consists of various-coloured sandstones, dolomites, and red clays, with some beds, especially in the Hartz, of calcareous pisolite or roe- stone, the whole sometimes attaining a thickness of more than 1000 feet. The sandstone of the Vosges is proved, by its fossils, to belong to this lowest member of the Triassic group.
It has been called the Trias by German writers, or the Triple Group, because it is separable into three distinct formations, called the "Keuper," the "Muschelkalk," and the "Bunter-sandstein." In certain grey indurated marls below the bone-bed Mr.
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