Online Encyclopedia

BUNTER

Online Encyclopedia
Originally appearing in Volume V04, Page 802 of the 1911 Encyclopedia Britannica.
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BUNTER, the name applied by English geologists to the lower stage or subdivision of the Triassic rocks in the United Kingdom. The name has been adapted from the German Buntsandstein, Der bunte Sandstein, for it was in Germany that this continental type of Triassic deposit was first carefully studied. In France, the Bunter is known as the Gres bigarre. In northern and central Germany, in the Harz, Thuringia and Hesse, the Bunter is usually conformable with the underlying Permian formation; in the south-west and west, however, it transgresses on to older rocks, on to Coal Measures near Saarbruck, and upon the crystalline schists of Odenwald and the Black Forest. The German subdivisions of the Bunter are as follows;—(1) Upper Buntsandstein, or Rot, mottled red and green marls and clays with occasional beds of shale, sandstone, gypsum, rocksalt and dolomite. In Hesse and Thuringia, a quartzitic sandstone prevails in the lower part. The " Rhizocoralhum Dolomite " (R. Jenense, probably a sponge) of the latter district contains the only Bunter fauna of any importance. In Lorraine and the Eifel and Saar districts there are micaceous clays and sandstones with plant remains—the Voltsia sandstone. The lower beds in the Black Forest, Vosges, Odenwald and Lorraine very generally contain strings of dolomite and carnelian—the so-called " Carneol bank." (2) Middle Buntsandstein-Hauptbuntsandstein (900 ft.), the bulk II
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ROBERT WILHELM VON BUNSEN (1811-1899)
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