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The Posidonia Shale (German: Posidonienschiefer, also called Schistes Bitumineux in Luxembourg) geologically known as the Sachrang Formation, is an Early Jurassic (Toarcian) geological formation of southwestern and northeast Germany, northern Switzerland, northwestern Austria, southern Luxembourg and the Netherlands, including exceptionally well-preserved complete skeletons of fossil marine fish and reptiles. The Posidonienschiefer, as German paleontologists call it, takes its name from the ubiquitous fossils of the oyster-related bivalve that characterize the mollusk faunal component of the formation.

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  • Der Posidonienschiefer oder Schwäbischer Ölschiefer ist ein asphaltgrauer bis tiefschwarzer bituminöser Tonstein aus dem Unterjura, der sich über weite Gebiete Mittel- und Nordwesteuropas erstreckt. Das Gestein ist für seine außergewöhnlich gute Fossilerhaltung bekannt, die den Posidonienschiefer zu einer Konservatlagerstätte von Weltrang gemacht hat. Die Posidonienschiefer-Formation aus der Zeit des frühen Toarciums (183,0 bis 175,6 mya) wird überwiegend aus Posidonienschiefer aufgebaut. (de)
  • The Posidonia Shale (German: Posidonienschiefer, also called Schistes Bitumineux in Luxembourg) geologically known as the Sachrang Formation, is an Early Jurassic (Toarcian) geological formation of southwestern and northeast Germany, northern Switzerland, northwestern Austria, southern Luxembourg and the Netherlands, including exceptionally well-preserved complete skeletons of fossil marine fish and reptiles. The Posidonienschiefer, as German paleontologists call it, takes its name from the ubiquitous fossils of the oyster-related bivalve that characterize the mollusk faunal component of the formation. The Posidonienschiefer, the German translation, takes its name from the ubiquitous fossils of the oyster-related bivalve "" (synonym of buchii and bronni) that characterize the mollusk faunal component of the formation. The name Posidonia Shale has been used for more than a century, until revisions in 2016 proposed the Sachrang Formation as new name for the Germanic unit, in a same way Altmühltal Formation is the official name of the Solnhofen Limestone. The Posidonia Shales where stablished as a valid vulgar name for this regions lower Toarcian Black Shales. The name Posidonienschiefer, while valid, represents another vulgar nomination, as Posidonia is an invalid genus and junior synonym of . The type profile is still located on Dotternhausen. The formation comprises finely laminated layers of oil shales formed of fine-grained sediments intercalated with bituminous limestones and crops out in a number of locations in southwestern Germany, although most remains are from near the village of Holzmaden. The European oil shales deposited on a sea floor during the Early Toarcian in the ancient Tethys Ocean are described as being deposited in an anoxic, or oxygen-depleted, deep water environment, although the details of the depositional environment are the subject of debate by researchers of the formation. The Sachrang member is among the most important formations of the Toarcian boundary in the Northern Alps realm This Sachrang member is included inside the major stratigraphic groups found on the Tirol Mountains in Central Europe, where is equivalent to the Saubach Formation, also from the Toarcian stage. It is part of the series of formations with the presence of Toarcian black shales, being among the most important of the Alpine-Mediterranean domain. Those Shales on the Northern Calcareous Alps was sedimented based on a strong dependency on the overall palaeobathymetric situation of the region, as recovered by the microfacies types as well as in the composition of the biota. The deeper part is domain of the Sachrang Shales, with a basin radiolaria-rich lithologies, and a parallel series of submarine topographic highs a dominance of echinoderm-and mollusc-biomicrites and a strong increase in resedimentation can be observed. (en)
  • Les argiles à Posidonies sont une formation géologique du Jurassique inférieur (Toarcien) du sud-ouest de l'Allemagne, affleurant en particulier près du village d'Holzmaden dans le Bade-Wurtemberg. Des équivalents latéraux de cette formation, riches en , sont également connus dans plusieurs pays d'Europe de l'Ouest : France (Schistes-carton), Royaume-Uni, Pays-Bas... Cette formation s'appelle « Posidonienschiefer » en allemand. Les posidonies sont ici des fossiles de mollusques lamellibranches, des Ostreida de la famille des , du genre et non des plantes aquatiques de la famille des Posidoniaceae du genre homonyme Posidonia. C'est l'espèce Posidonia bronni qui abonde dans cette formation. (fr)
  • De Posidoniaschalie is een geologische formatie bestaande uit grijze tot zwarte schalie uit het Vroeg-Jura (Lias of zwarte Jura), om precies te zijn behoort de formatie tot het Toarcien (ongeveer 183 tot 176 miljoen jaar geleden). De formatie komt op diverse plekken in Centraal- en Noordwest-Europa aan het oppervlak of in de ondergrond voor. In de Nederlandse lithostratigrafie is de Posidonia Schalie Formatie onderdeel van de Altena-groep. Het gesteente bevat een grote hoeveelheid organisch materiaal in de vorm van bitumen en kan daardoor vettig aanvoelen. In Duitsland wordt het daarom wel Ölschiefer (olieschalie) genoemd, maar dit is eigenlijk een verkeerde naam omdat de Posidoniaschalie geen aardolie bevat. In Frankrijk, Nederland en Neder-Saksen is de Posidonia Schalie vaak het moedergesteente voor olie en gas. Dit is met name het geval bij alle olievelden in het West-Nederlands Bekken. De Posidoniaschalie is bekend vanwege de fossielen die erin gevonden worden. Bekende vindplaatsen zijn in de omgeving van Holzmaden. Onder de fossielen zijn crinoïden, ammonieten, vissen en ichthyosauriërs. (nl)
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dbp:age
  • ~ (en)
  • Early Toarcian (en)
dbp:caption
  • Posidonia Shale Outcrop (en)
dbp:extent
  • *Northwest *Southwest German Basins *Bavaric Nappe-Northern Tirol (en)
dbp:mapCaption
  • Holzmaden, location of the main Outcrop (en)
dbp:name
  • Sachrang Formation (en)
dbp:namedby
  • Jacobshagen (en)
dbp:namedfor
  • The village of Sachrang, Bavaria (en)
dbp:otherlithology
  • Lime mudstone, nodular claystone (en)
dbp:overlies
dbp:period
  • Toarcian (en)
dbp:prilithology
dbp:region
dbp:subunits
  • *Bächental Schichten *Unkenschiefer *Dörnten-Schiefer (en)
dbp:type
dbp:underlies
dbp:unitof
  • *Altena Group *Schwarzjura Group *Northern Calcareous Alps (en)
dbp:wikiPageUsesTemplate
dbp:yearTs
  • 1965 (xsd:integer)
dcterms:subject
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rdfs:comment
  • Der Posidonienschiefer oder Schwäbischer Ölschiefer ist ein asphaltgrauer bis tiefschwarzer bituminöser Tonstein aus dem Unterjura, der sich über weite Gebiete Mittel- und Nordwesteuropas erstreckt. Das Gestein ist für seine außergewöhnlich gute Fossilerhaltung bekannt, die den Posidonienschiefer zu einer Konservatlagerstätte von Weltrang gemacht hat. Die Posidonienschiefer-Formation aus der Zeit des frühen Toarciums (183,0 bis 175,6 mya) wird überwiegend aus Posidonienschiefer aufgebaut. (de)
  • The Posidonia Shale (German: Posidonienschiefer, also called Schistes Bitumineux in Luxembourg) geologically known as the Sachrang Formation, is an Early Jurassic (Toarcian) geological formation of southwestern and northeast Germany, northern Switzerland, northwestern Austria, southern Luxembourg and the Netherlands, including exceptionally well-preserved complete skeletons of fossil marine fish and reptiles. The Posidonienschiefer, as German paleontologists call it, takes its name from the ubiquitous fossils of the oyster-related bivalve that characterize the mollusk faunal component of the formation. (en)
  • Les argiles à Posidonies sont une formation géologique du Jurassique inférieur (Toarcien) du sud-ouest de l'Allemagne, affleurant en particulier près du village d'Holzmaden dans le Bade-Wurtemberg. Des équivalents latéraux de cette formation, riches en , sont également connus dans plusieurs pays d'Europe de l'Ouest : France (Schistes-carton), Royaume-Uni, Pays-Bas... Cette formation s'appelle « Posidonienschiefer » en allemand. (fr)
  • De Posidoniaschalie is een geologische formatie bestaande uit grijze tot zwarte schalie uit het Vroeg-Jura (Lias of zwarte Jura), om precies te zijn behoort de formatie tot het Toarcien (ongeveer 183 tot 176 miljoen jaar geleden). De formatie komt op diverse plekken in Centraal- en Noordwest-Europa aan het oppervlak of in de ondergrond voor. In de Nederlandse lithostratigrafie is de Posidonia Schalie Formatie onderdeel van de Altena-groep. (nl)
rdfs:label
  • Posidonia Shale (en)
  • Posidonienschiefer (Jura) (de)
  • Argiles à Posidonies (fr)
  • Posidoniaschalie (nl)
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