Eichberg formation

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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 Eichberg Formation is a lithostratigraphic formation of the southern German Jura . It is underlain by the Opalinus Clay Formation and overlaid by the Wedel Sandstone Formation . To the east it is laterally replaced by the iron sandstone formation . In the Upper Rhine area it is represented by the Murchisonaeoolith formation . In East Württemberg it reaches a maximum thickness of 75 m. It is dated to the Oberaalenium .

    history

    The term was proposed by Gert Bloos, Gerd Dietl and Günter Schweigert in 2005 for a lithostratigraphic rock formation that used to be mostly as iron sandstone or z. T. was also referred to as personate sandstone.

    definition

    The Eichberg Formation consists mainly of clay stones in which individual bioclastic limestone banks are embedded. Some banks also carry iron oids. The so-called “Comptum banks” were defined as the basis of the formation. The upper limit is the top of the "Concava sandstone bank", or the base of the "Sowerbyi oolith", which is already included in the frond sandstone formation . The type locality of the Eichberg formation is on Eichberg (municipality of Blumberg ) in the Wutach region .

    Temporal scope and distribution area

    The Eichberg Formation is stratigraphically dated to the Oberaalenium. In the Quenstedt structure, this corresponds to the Dogger beta. The formation extends from the Upper Rhine area to East Württemberg. There it meshes with the iron sandstone formation .

    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.

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