Angulate tone formation

from Wikipedia, the free encyclopedia
Lithostratigraphy of the South German Jura .
Abbreviations:
  • Humph.-Fm. = Humphriesioolite Formation
  • L.Bk-Fm = Lying bench lime formation
  • H.Bk-Fm = hanging bank lime formation
  • Zm-Fm = cement marl formation
  • S.-Fm = Solnhofen formation
  • Rö.-Fm = Rögling formation
  • U.-Fm = Usseltal formation
  • Mö.-Fm = Mörnshein formation
  • N.-Fm = Neuburg formation
  • R.-Fm = Rennertshofen formation

    • The Angulate Clay Formation is a lithostratigraphic formation of the southern German Jura. It is limited to the western part of the Swabian Alb and the Upper Rhine Graben and interlocks to the east with the Angulate sandstone formation . It is underlain by the Psilonotenton Formation and overlaid by the Arietenkalk Formation . The Angulate Clay Formation is dated to the Upper Hettangian ( Lower Jurassic ).

    definition

    The Angulate Clay Formation consists primarily of claystones with a few embedded siltstone banks and silty-sandy limestone banks. It is limited to the western part of the Swabian Alb (west of a line Stuttgart - Hechingen ) and the Upper Rhine area. The thickness varies between 3 and 9 m. The base of the formation is formed by the so-called "Oolithenbank", which contains Eisenooide and Schill. The upper limit is the lower limit of the Arietenkalk Formation , which is, however, formed quite differently. In many areas, the base of the Arietenkalk formation is formed by the so-called "copper rock bank". There is a gap between the Angulate Clay Formation and the Arietenkalk Formation. The sediments of the Angulatenton formation were during the Oberhettangiums deposited that the Ammoniten zones of Alsatites liasicus ( Liasicus zone ) and the Schlotheimia angulata ( Angulata zone comprises).

    Breakdown

    The Angulate Clay Formation is formally not further subdivided. The so-called "Oolithenbank" is eliminated at the base. In the higher part of the formation there is a 1 m thick sand-lime stone bank, the "Vaihingen-Plasterstein" or "Giant Angulate Bank".

    Fossil guide

    The Angulate Clay Formation contains ammonites and mussels .

    literature

    • Gert Bloos, Gerd Dietl, Günter Schweigert: The Jura of Southern Germany in the Stratigraphic Table of Germany 2002. In: Newsletters on Stratigraphy. Vol. 41, No. 1/3, 2005, ISSN  0078-0421 , pp. 263-277.
    • Friedrich August Quenstedt: The Jura. Laupp Publishing House, Tübingen 1856–57.

    Web links