Wortgeschichten aus der Keuperstratigraphie, II: Lettenkohle und Lettenkeuper
[The story of terms used in Keuper stratigraphy, II: Lettenkohle and Lettenkeuper]
published: Jun 1, 2005
ArtNo. ESP171015502008, Price: 29.00 €
The term Lettenkohle has been coined by J. C. L. Voigt in 1800 to designate coal with an extraordinarily high content of mud (“Letten”). The term has since been used as a rock name for muddy coals of the Keuper group in Germany, but it recieved an additional stratigraphic meaning in 1834, when Friedrich von Alberti called the lowermost stratigraphic unit of the Keuper the “Lettenkohlengruppe”. In the 19th and early 20th century, variable names were given to this stratigraphic unit (Lettenkohle, Lettenkohlenkeuper, Kohlenkeuper), out of which “Lettenkeuper” arose as an outstanding favorite in German geologic literature.