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- The Dactyliocerassandstein Formation (also known as Epsilonkalksandstein Formation) is a Lower Jurassic (Lower Toarcian) geologic formation primarily located in Bavaria, Germany. The Formation appears on places like Bruck in der Oberpfalz, the north-east of the Banz Abbey, Wittelshofen, Regensburg and Bodenwöhr. In the astly foreland it extends from the Kulmbach area via Bayreuth, Creussen, Hirschau and Amberg to Schwandorf. Its southernmost known occurrences seems to be Schwandorf himself and Haselbach, although is also found at , far at the south. Is composed mostly by clusters of clay sandstone and sand-lime stone facies (shale, slightly bituminous in layers, and sandstone, lias sand, sand marl, marl, oolithic limestone and sand-lime banks) occurs only in the south-east of the northern Bavarian Jura region, for example at the edge of the granite Bavarian forest. On its northern edge, it is noticeably less tectonically disturbed in the Bodenwoehr basin near Sollbach. On the western edge it only appears on the Keilberg (east of Regensburg) and Irlbach (NE Regensburg).It is a deposit recovered It is the same age as the marine Posidonia Shale, and has been identified as part of it in many sources. The formal relationship between the two layers, however, is undefined; the Posidonia Shale is sometimes described as a different coeval unit or a changed sector, possibly with more terrestrial influence. The extent of the major outcrop of the formation is not clearly delimited. It has been observed in Straßkirchen, Bogen, Straubing; its westernmost points are in Pfatter and a deep outcrop in . The name of the Formation derives from the presence of Dactylioceras commune and annulatum, as part of the Monotis-Dactylioceras Bed present along the Lower Toarcian deposits on Bavaria. This Dactylioceras bank was recognized as the facies of the peel-poor bank, and was not destroyed in the Bifrons regression, hence the acummulation of Ammonites and the name of the layer. Is even preserved in the coastal area of the sand deposit, when the regression probably increased the transportability of the water so large that the thin, light (=Arctotis) shells were moved, but not the heavy ones, which at that time already contained sands filled of Dactylioceras specimens. (en)
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| rdfs:comment
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- The Dactyliocerassandstein Formation (also known as Epsilonkalksandstein Formation) is a Lower Jurassic (Lower Toarcian) geologic formation primarily located in Bavaria, Germany. The Formation appears on places like Bruck in der Oberpfalz, the north-east of the Banz Abbey, Wittelshofen, Regensburg and Bodenwöhr. In the astly foreland it extends from the Kulmbach area via Bayreuth, Creussen, Hirschau and Amberg to Schwandorf. Its southernmost known occurrences seems to be Schwandorf himself and Haselbach, although is also found at , far at the south. Is composed mostly by clusters of clay sandstone and sand-lime stone facies (shale, slightly bituminous in layers, and sandstone, lias sand, sand marl, marl, oolithic limestone and sand-lime banks) occurs only in the south-east of the northern (en)
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