Quenstedt structure

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There should actually be enough specialist literature on this lemma, because it is not a trivial term in geology, but a very special topic (the information that the creator of the article had must come from somewhere). We are no longer in the early days of Wikipedia, when completely paper-free articles were still acceptable! - Gretarsson ( discussion ) 17:23, Oct 27, 2016 (CEST)

In the Quenstedt structure , the three main layers of the Jurassic rocks (from bottom to top: Lias , Dogger , Malm ) in southern Germany are each divided into 6 further layers.

These intermediate levels are designated with 6 letters of the Greek alphabet (from bottom to top: Alpha, Beta, Gamma, Delta, Epsilon, Zeta). The Quenstedt division is named after the well-known Tübingen geologist Friedrich August Quenstedt (1809–1889). This classification can only be used in the Jura strata of southern Germany and is based on lithographic and biostratigraphic knowledge. The international classification , which is based on bio- and chronostratigraphic knowledge, applies to the global classification . In biostratigraphy, index fossils that only occur in a certain layer are used to determine the layer levels. In the Jurassic layers these fossils are almost exclusively ammonites , from which the name "Leitammoniten" results.