Altenglan formation

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Lithostratigraphic structure of the permocarbon of the Saar-Nahe basin, abbreviations: O. = Upper, M. = Middle, U. = Lower, Subgr. = Subgroup, Nierst.-F. = Nierstein formation

The Altenglan Formation is a lithostratigraphic rock unit of the Rotliegend of the Saar-Nahe basin in the history of the earth . It follows the Remigiusberg formation and is overlaid by the Wahnwege formation . The chronostratigraphic dating is still uncertain. It is probably still to be placed in the highest carbon .

Naming and conceptual history

The Altenglan formation is named after the place Altenglan in the district of Kusel in Rhineland-Palatinate . The name was already used in 1910 by Ludwig von Ammon and Otto Maria Reis as "Altenglahner level" (according to the old spelling of Altenglan) in literature. In 1914 Paul Kessler used the term "Altenglaner layers". In 1990 Karl Stapf changed the term again to align with the guidelines for lithostratigraphy in Altenglan formation.

Definition, Correlation and Age

The Altenglan formation consists of gray and gray-green fine sand and clay stones in which seldom red colored fine sand and clay stones are embedded. In this sequence, banks of gray limestone are switched on, which can be followed regionally in the lower and middle section. As a result, some dark gray to black clay stones ("black pelites") also appear. The formation seldom contains thin rhyolite tuffs and coal seams. The lower limit is formed by the color change in the pelite from red to gray below the Altenglaner limestone zone. The upper limit is again drawn on the basis of a color change in the Peliten, this time from gray to red. The Altenglan formation wedges towards the edge of the pool and is represented there by the Wadern formation . The thickness of the Altenglan Formation varies from about 20 to 130 m; at the type locality it is 105 m thick. It is formally lithostratigraphically not subdivided into Suformations, but contains some important benchmarks in Rhineland-Palatinate: Hirschfeld Bank (with coal seam), Ottweiler Bank, Reckweilerhof Bank (with the Reckweilerhof Tuff), Hauptkalk Bank and the Kochrain Bank .

Storage room and fossils

It is almost exclusively lacustrine deposits with small amounts of fluvial debris. The sea horizons are z. Partly traceable across the pelvis. The layers contain numerous fossils, including plant fossils (horsetail and ferns), freshwater snails, tube worms ( Spirorbis ), clams, mussel crabs (Ostracoda), gill pods (Branchiopoda) and vertebrate remains such as those of the Branchiosaur Apatbodheon , shark teeth and scales Acanthodes, bony fish, lung fish, coelacanth and, rarely, temnospondylation remains. In addition, other amphibians and reptiles were identified by their tracks.

swell

literature

  • Manfred Menning, Reinhard Benek, Jürgen Boy, Bodo-Carlo Ehling, Frank Fischer, Birgit Gaitzsch, Reinhard Gast, Gotthard Kowalczyk, Harald Lützner, Wolfgang Reichel and Jörg W. Schneider: Das Rotliegend in the Stratigraphic Table of Germany 2002 - "Paternoster- Stratigraphy ”on the retreat. Newsletters on Stratigraphy, 41 (1-3): 91-122, Stuttgart 2005 ISSN  0078-0421
  • Andreas Schäfer: Sedimentologically-numerically based stratigraphic standard for the permo-carbon of the Saar-Nahe basin. Courier Forschungsinstitut Senckenberg (Stratigraphie von Deutschland V - Das Oberkarbon (Pennsylvanium) in Germany), 254: 369–394, Frankfurt 2005 ISBN 3-510-61380-5
  • Thomas Schindler and Ulrich HJ Heidtke (eds.): Coal swamps, lakes and semi-deserts. Pollichia special publication, 10: 1–316, Neustadt an der Weinstrasse, 2007.
  • Karl RG Stapf: Introduction of lithostratigraphic formation names in the Rotliegend of the Saar-Nahe basin (SW Germany). Messages from Pollichia, 77: 111-124, Bad Dürkheim 1990 ISSN  0341-9665 .

Individual evidence

  1. ↑ JA Boy and W. Schindler: Ökostratigraphische Bioevents in the border area Stefanium / Autunium (highest carbon) of the Saar-Nahe-Basin (SW-Germany) and neighboring areas. New Yearbook for Geology and Paleontology, Treatises, 216: 89-152, Stuttgart.
  2. ↑ Ludwig von Ammon and Otto M. Reis: Explanations on the sheet Kusel of the geognostic map of the Kingdom of Bavaria 1: 100,000. 186 pp., Munich 1910.
  3. ^ Paul Kessler: Attempt to determine the time of the disturbance processes in the Saar-Nahe area. Geological-Palaeontological Treatises, New Series, 13: 125-220, Jena 1914 Online at archive.org
  4. ^ Stapf (1990: p. 118)
  5. ↑ Important lithostratigraphic units in the Altenglan formation. (No longer available online.) Formerly in the original ; accessed on July 12, 2020 .  ( Page no longer available , search in web archives ) @1@ 2Template: Dead Link / www.lgb-rlp.de
  6. ↑ a b Thomas Schindler: Geology, stratigraphy and genesis of the permocarbonic Saar-Nahe basin. In: Thomas Schindler and Ulrich HJ Heidtke (eds.): Coal swamps, lakes and semi-deserts. Pollichia special publication, 10: 4-37, Neustadt an der Weinstrasse, 2007
  7. ^ Rainer R. Schoch and Florian Witzmann: Osteology and relationships of the temnospondyl genus Sclerocephalus. Zoological Journal of the Linnean Society, 157: 135-168, 2009. doi : 10.1111 / j.1096-3642.2009.00535.x

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