Facies dynamics of the Lower Muschelkalk (Middle Triassic) near Bad Hersfeld (North Hessen, Germany) with comments on the origin of the micrites

1986 ◽  
Vol 1986 (9) ◽  
pp. 513-528 ◽  
Author(s):  
Dirk-D. Dahmer ◽  
Heinz Hilbrecht
Keyword(s):  
Middle Triassic ◽  
Lower Muschelkalk

scholarly journals New geological data (Middle Triassic, Rhaetian-Liassic and Oligocene) of the Winterswijk quarry, the eastern Netherlands

2005 ◽  
Vol 84 (4) ◽  
pp. 409-413 ◽  
Author(s):  
G.F.W. Herngreen ◽  
J.H.A. van Konijnenburg - van Cittert ◽  
H.W. Oosterink
Keyword(s):  
Middle Triassic ◽  
Geological Data ◽  
Small Interval ◽  
Marine Clay ◽  
Black Clay ◽  
Lower Oligocene ◽  
Clay Deposits ◽  
Shale Formation ◽  
First Time ◽  
Lower Muschelkalk

AbstractThe present publication deals with recent palynological results of a relatively small interval of Muschelkalk and exposures of the overlying clay deposits in the Winterswijk quarries. For the first time the Lower Muschelkalk Member in the Netherlands could be independently dated as Bithynian (Anisian, Middle Triassic). Contrary to widely accepted opinions the overlying almost black clay deposit is not Liassic but Rhaetian in age and it is assigned to the Sleen Shale Formation. This marginal marine clay which pinches out to the south, is in turn overlain by a light gray, full-marine Lower-Oligocene clay of the Rupel Formation. An anomalous occurrence of Liassic clay is now attributed to subrosion of Röt salt followed by collapse of the overlying Muschelkalk, Rhaetian and Lias strata.

Probable remains of jellyfish (Cnidaria, Scyphozoa) from the lower Middle Triassic (Anisian) of Winterswijk, eastern Netherlands

2013 ◽  
Vol 92 (1) ◽  
pp. 61-67 ◽  
Author(s):  
H.W. Oosterink ◽  
H. Winkelhorst
Keyword(s):  
Middle Triassic ◽  
Lower Muschelkalk

AbstractDuring recent years, regular round structures have been collected from the top of Bed 12 of the Vossenveld Formation (Lower Muschelkalk, lower Middle Triassic, Anisian) in the Winterswijk area, eastern Netherlands. These are here illustrated and described as probable remains of jellyfish.

IchnogenusPholeusFiege, 1944, revisited

2002 ◽  
Vol 76 (5) ◽  
pp. 882-891 ◽  
Author(s):  
Dirk Knaust
Keyword(s):  
Middle Triassic ◽  
Decapod Crustaceans ◽  
Lower Saxony ◽  
Shallow Marine ◽  
Wall Lining ◽  
Sediment Input ◽  
New Material ◽  
Shallow Subtidal ◽  
Marly Limestone ◽  
Lower Muschelkalk

The ichnogenusPholeusFiege, 1944, is a common constituent of the Lower Muschelkalk (Middle Triassic) carbonates of the Germanic Basin, where it occurs in the upper part of shallowing upward cycles. It is restricted to a marly limestone lithofacies and is commonly associated with omission and erosion surfaces. The dwelling structures (domichnia) were created in a shallow-marine to lagoonal paleoenvironment in an intertidal to shallow subtidal setting. New material from Thuringia and Lower Saxony makes a reevaluation ofPholeuspossible and confirms the validity of this ichnogenus. Certain features, such as general form, wall, lining, and branching differentiate it from similar trace fossils. In addition to the already describedP. abomasoformis,three new ichnospecies are named for distinctive forms:P. bifurcatus, P. platiformis,andP. elongatus.Based on geometry, size, and wall lining, the burrow producers were most probably decapod crustaceans. Many similarities to modern burrows ofCallianassasp.,Neocallichirus grandimina,andNephrops norvegicussuggest thalassinian shrimps and lobsters as likely tracemakers ofPholeusburrows. Compound burrow systems and retrusive burrow parts with spreiten-like structures are common and point to an upward shifting of the burrows related to certain sediment input in relation to tidal currents.

An unusual, muddy, epeiric carbonate reservoir: The Lower Muschelkalk (Middle Triassic) of the Netherlands

AAPG Bulletin ◽  
2006 ◽  
Vol 90 (1) ◽  
pp. 61-89 ◽  
Author(s):  
Ravi Borkhataria ◽  
Thomas Aigner ◽  
Koos J.C.P. Pipping
Keyword(s):  
The Netherlands ◽  
Middle Triassic ◽  
Carbonate Reservoir ◽  
Lower Muschelkalk

scholarly journals An enigmatic lower jaw from the Lower Muschelkalk (Anisian, Middle Triassic) of Winterswijk provides insights into dental configuration, tooth replacement and histology

2021 ◽  
Vol 100 ◽  
Author(s):  
Stephan N.F. Spiekman ◽  
Nicole Klein
Keyword(s):  
Middle Triassic ◽  
Posterior Part ◽  
Dorsal Surface ◽  
Dental Morphology ◽  
Posterior Teeth ◽  
Dental Lamina ◽  
Computed Tomographic ◽  
Anterior Teeth ◽  
Replacement Pattern ◽  
Lower Muschelkalk

Abstract In the aftermath of the Permo-Triassic mass extinction event, several reptile lineages radiated to form major components of marine faunas during the entire Mesozoic. The Lower Muschelkalk, which was deposited within a shallow inland sea in the Germanic Basin during the Middle Triassic, is one of the most important regions for understanding the early evolution of Mesozoic marine reptiles. Here, we present a new specimen from the Lower Muschelkalk of Winterswijk in the Netherlands, comprising an isolated left dentary that is morphologically distinct from any well-known Triassic vertebrate. We provide a detailed description of the jaw and the teeth using histological and micro-computed tomographic analyses. The anterior teeth are fang-like and curved, whereas the posterior teeth are wider and triangular-shaped. Tooth implantation is thecodont and teeth are ankylosed to the base of the alveolus. Replacement teeth are developed directly lingual to the functional teeth, starting with the formation of a resorption cavity on the dorsal surface of the alveolar margin. The replacement pattern cannot be observed in detail but is regular in the posterior part of the dentary with each tooth being alternated with an empty alveolus. The specimen can likely be assigned to Eosauropterygia based on its jaw morphology and dental morphology and replacement pattern, and it is remarkably similar to maxillae referred to the enigmatic Lamprosauroides goepperti from the Lower Muschelkalk of Poland. The dentary from Winterswijk lacks enlarged, ‘alveolarised’ crypts and corresponding distinct dental lamina foramina (DLFs) for the replacement teeth, a configuration that is typical of Sauropterygia, but which was likely not omnipresent in this clade. The specimen also exhibits loosely folded plicidentine at the roots of the teeth, likely representing the first identification of this feature in Sauropterygia.

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