Tsunami killed and backwashed accumulated crinoids in Middle Triassic (Anisian) intracratonic Germanic Basin carbonates of central Europe

Diedrich, Cajus G.

doi:10.1007/s13146-017-0391-0

Cited by 5 publications

(4 citation statements)

References 19 publications

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“…The younger and rich enodis/posseckeri Bonebed, of which the herein described fauna was former brie y reported [17] is analysed herein with much more material (additional excavations after 2003). This bonebed is from the lowermost Lower Ladinian, dated by the cephalopod ceratites (see gures in [14]) of Ceratites (Gymnoceratites) enodis Quenstedt, for which steinkerns underand overly the bonebed. Last ceratite nds above are from Ceratites (Ceratites) sublaevigatus Wenger in the nal marine in uence in this region (last limestone beds, see Figure 2, 11A).…”

Section: Discussion Bonebed Layers In the Germanic Basin And Their mentioning

confidence: 99%

“…The Trochitenkalk limestone series contains in the region a high amount (about 85%) of isolated remains of the crinoid Encrinus liliiformis. 90 cm above the "Upper Trochitenkalk", a tsunamite layer with complete crinoids was discovered [13] excavated and analyzed [14]. About 40 cm below this allochthonous crinoid layer, the autochthonous bioherm bed was found with about one metre wide and 40 cm high bioherms on large scaled ripple marks on the top of the Upper Trochitenkalk Bed.…”

Section: Geology Stratigraphy and Faciesmentioning

confidence: 99%

“…About 40 cm below this allochthonous crinoid layer, the autochthonous bioherm bed was found with about one metre wide and 40 cm high bioherms on large scaled ripple marks on the top of the Upper Trochitenkalk Bed. Those bioherms are in the pulcher Biozone, whereas the crinoid layer is already in the compressus Biozone [14] ( Figure 2).…”

Section: Geology Stratigraphy and Faciesmentioning

confidence: 99%

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The vertebrates from the Lower Ladinian (Middle Triassic)bonebed of Lamerden (Germany) as palaeoenvironmentindicators in the Germanic Basin

Diedrich¹

2015

Open Geosciences

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A marine/limnic vertebrate fauna is described from the enodis/posseckeri Bonebed mixed in a bivalve shell-rich bioclastic carbonate rudstone at the eastern coastal margin of the Rhenish Massif mainland at Lamerden (Germany) within the western Germanic Basin (Central Europe). The condensation layer is of Fassanian (Ladinian, Middle Triassic) in age. The vertebrate biodiversity includes ve di erent shark, and several actinopterygian sh species represented by teeth and scales. Abundant isolated bones from a small-and a large-sized pachypleurosaur Neusticosaurus species, which can be composed as incomplete skeletons, originate from dense populations of di erent individual age stages. Important facies indicator reptiles are from the thalattosaur Blezingeria ichthyospondyla which postcranial skeleton is reconstructed hypothetically using additional postcranial bones from similar aged various German localities. The vertebrate biodiversity of the enodis/posseckeri bonebed of Lamerden re ect a limnic/ uvial freshwater in uenced fauna (amphibians/terrestrial and marine reptiles) with dominance of normal saline marine in uences. Macroalgae meadow adapted placodont reptiles are absent in Lamerden, as well as open marine-adapted ichthyosaurs, supporting a lagoon with fresh water in uence position at the Rhenish Massif mainland coast. In those contemporanous brackish lagoons, which seem to be isochronous to northern Tethys lagoons of the Kalschieferzone at the Monte San Giorgio (Switzerland/Italy), small pachypleurosaurs were abundant prey in both regions for reptile predators, especially large paraxial swimming alligator habitus-like Paranothosaurus, which even contain stomach contents of pachypleurosaurs.

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Section: Discussion Bonebed Layers In the Germanic Basin And Their mentioning

confidence: 99%

Section: Geology Stratigraphy and Faciesmentioning

confidence: 99%

Section: Geology Stratigraphy and Faciesmentioning

confidence: 99%

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The vertebrates from the Lower Ladinian (Middle Triassic)bonebed of Lamerden (Germany) as palaeoenvironmentindicators in the Germanic Basin

Diedrich¹

2015

Open Geosciences

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“…Although framework-producing biota, such as the crinoidal bioherms, can modify ramp morphologies (Pomar 2001), their presence in northern Switzerland did not have an appreciable effect on the sedimentation of the Upper Muschelkalk ramp. This may be due to the patch-reef-like distribution of Upper Muschelkalk crinoid bioherms (Hagdorn 2006;Diedrich 2017) or potentially to the lack of high-energy crinoid banks in Switzerland. Bioherm thicknesses do not exceed two meters and despite shallow water depths, bioherms were likely never large enough to restrict and constrain sediments to the backshoal environments.…”

Section: The Transgressive Crinoidal Rampmentioning

confidence: 99%

Facies and depositional environments of the Upper Muschelkalk (Schinznach Formation, Middle Triassic) in northern Switzerland

Adams

Diamond

2019

Swiss J Geosci

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Subsurface sedimentary strata in northern Switzerland, such as the Middle Triassic Upper Muschelkalk, are attracting interest as potential reservoirs for CO 2 sequestration and for geothermal energy production. Characterizing facies in such strata aids prediction of reservoir properties in unexplored areas. Although well studied elsewhere, the Swiss Upper Muschelkalk has received little attention despite containing the southern-most deposits of the Central European Basin. The Upper Muschelkalk represents the deposits of a storm-dominated, homoclinal carbonate ramp, developed during a basinwide 3rd-order transgressive-regressive cycle. Our facies analyses of nine boreholes across northern Switzerland reveal 12 lithofacies, eight lithofacies associations and four types of metre-scale 5th-order cycles corresponding to at least 23 short orbital eccentricity cycles. During the 3rd-order transgression, crinoidal bioherms developed across Switzerland followed by deep-ramp environments. Subsequently, tempestites were deposited up to and after the basin-wide maximum flooding surface. Lateral tempestite correlations indicate that Switzerland lay within an open-marine, mid-ramp environment during almost half of the depositional history. Mid-ramp deposits pass upwards to prograding shelly shoals, which sheltered a back-shoal lagoon containing patchy oolitic shoals. At the top of the Upper Muschelkalk, back-shoal sediments give way to coastal sabkha facies, which were overlain by oolitic shoals during a marine transgression. Shortly thereafter the top of the Upper Muschelkalk was dolomitized by brines from an overlying hypersaline environment that was later removed by a basin-wide erosive event. Overall, the paucity of porous shoal facies, unlike in southern Germany, has resulted in poor primary reservoir properties in the Upper Muschelkalk of Switzerland.

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A tsunami deposit in the Stonewall Formation (Upper Ordovician), northeastern margin of the Williston Basin, Canada, and its tectonic and stratigraphic implications

Pratt,

Sproat

2023

Sedimentary Geology

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Tsunami killed and backwashed accumulated crinoids in Middle Triassic (Anisian) intracratonic Germanic Basin carbonates of central Europe

Cited by 5 publications

References 19 publications

The vertebrates from the Lower Ladinian (Middle Triassic)bonebed of Lamerden (Germany) as palaeoenvironmentindicators in the Germanic Basin

The vertebrates from the Lower Ladinian (Middle Triassic)bonebed of Lamerden (Germany) as palaeoenvironmentindicators in the Germanic Basin

Facies and depositional environments of the Upper Muschelkalk (Schinznach Formation, Middle Triassic) in northern Switzerland

A tsunami deposit in the Stonewall Formation (Upper Ordovician), northeastern margin of the Williston Basin, Canada, and its tectonic and stratigraphic implications

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