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The Lower-Middle Jurassic of the Krížna unit in the Western Tatra Mts. (southern Poland) shows considerable facies variation. Crinoidal grainstones of variable thickness (up to 12 m) are one of characteristic facies. They occur above spiculites which were deposited below storm wave base on the slopes of elevated horsts. First single beds of crinoidal limestones occur within spiculites. They were deposited...
Although many case studies describe stromatoporoid-rich Jurassic reefs, there are only few reliable data as to their distribution pattern. This is in part due to a largely taxonomic and systematic focus on the enigmatic stromatoporoids which now are interpreted as a polyphyletic informal group of demosponges by most specialists. The common co-occurrence of Jurassic scleractinian corals and stromatoporoids...
For the first time, two outcrops near Bad Dürrnberg (2 km SSW Hallein, Austria) allowed for a continuous multistratigraphical investigation of the Reingraben Turnover in the Hallstatt facies belt. After a phase of reefal sedimentation during the Julian 1 (Early Carnian), a sudden increase in terrigenous input (Reingraben Turnover) caused the breakdown of the carbonate factory at the beginning of the...
The Late Jurassic succession of Mount Rettenstein (central Northern Calcareous Alps, Austria) is unique in comparison to all other sections known in the Northern Calcareous Alps because it provides the oldest coexistence of radiolarite basin sedimentation with contemporaneous shallow-water carbonate intercalations. An up to 3.5-m-thick debris flow made up of shallow-water carbonate detritus with a...
Considering the diversity and abundance of larger foraminifera examined from a wide range of Late Oligocene to Early Miocene palaeoenvironments in the Tethyan Seaway, encrusting bryozoans make extremely little use of their tests as substratum. Significant encrustations by bryozoans were exclusively found on large (ø c. 6 cm), undulating tests of Lepidocyclina spp., on which, however, a remarkable...
The incertae sedis Carpathoporella Dragastan, 1995, reported from the Lower Cretaceous of the Western Tethyan domain, is usually interpreted as remains of calcareous algae (Dasycladales or Characeae). New thin-section material from the Aptian of Albania sheds light not only on its biogenic nature but also on the morphological variability of this taxon. In fact, Carpathoporella represents the debris...
Tubiphytes Maslov (Nigriporella Rigby, Shamovella Rauser-Chernoussova) and similar organisms belong to one of the most abundant, enigmatic fossils reported from Carboniferous to Cretaceous rocks of numerous localities worldwide. Tubiphytes has been referred to many distinctly different organisms of the Tethys occurring in shallow water, particularly reef biotopes. Paleozoic Tubiphytes were revised...
Abundant calcispheres occur in Upper Carnian and Norian hemipelagic limestone successions of the Southern Apennines and Sicily. They exhibit a variety of morphologies that were investigated with optical and scanning electron microscopy (SEM). The most common morphology is that of a full solid sphere of radiaxial calcite crystals, 20–22 μm in diameter on average, with or without a minor hollow in the...
Permian–Triassic boundary sections in the Julfa (NW Iran) and Abadeh (Central Iran) regions display a succession of three characteristic rock units, (1) the Paratirolites Limestone with the mass extinction horizon at its top, (2) the ‘Boundary Clay’, and (3) the earliest Triassic Elikah Formation with the conodont P–Tr boundary at its base. The carbonate microfacies reveals a facies change, in the...
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