White Jurassic
group
The White Jurassic or White Jura (German: Weißer Jura or Weißjura) in Earth history refers to the upper of the three lithostratigraphic units of the South German Jurassic, the latter being understood not as a geographical, but a geological term in the sense of a lithostratigraphic super group. Formerly and even occasionally today in the popular scientific literature, this term is equated to the chronostratigraphic series of the Upper Jurassic. This is however not quite correct, because the White Jura does not exactly coincide with the chronostratigraphic boundaries of the Upper Jurassic. In addition, the term Malm, which was formerly frequently used as a synonym should no longer be used in connexion with the South German Jurassic. Instead the term "Malm" should be reserved for the roughly equivalent lithostratigraphic unit in the North German Jurassic. The White Jurassic was deposited about 161-150 million years ago. The White Jurassic follows the lithostratigraphic unit of the Brown Jurassic. Its upper boundary is erosive. Locally the White Jurassic is overlain with a large stratigraphic hiatus of the Regensburg Green Sandstone (Cenomanian).
See also
Black Jurassic
Literature
Gert Bloos, Gerd Dietl & Günter Schweigert: Der Jura Süddeutschlands in der Stratigraphischen Tabelle von Deutschland 2002.
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This entry incorporates text from “White Jurassic” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.