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Tytuł:
New ornithischian dinosaur footprints in the Jurassic of Poland
Autorzy:
Gierliński, G.
Gaździcka, E.
Niedźwiedzki, G.
Pieńkowski, G.
Tematy:
Polska
Hettangian
Kimmeridgian
Ornithischia
dinosaurs
footprints
Pokaż więcej
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Powiązania:
https://bibliotekanauki.pl/articles/2059274.pdf  Link otwiera się w nowym oknie
Opis:
New stratigraphic horizons with the ornithischian footprints have been found in central Poland. Basal thyreophoran ichnites are reported from the middle Hettangian Skloby Formation of Gromadzice. They support the previous conclusion that small and medium-sized Early Jurassic ornithischians preferred a coastal habitat with low-rise vegetation. Another find, an ornithopod footprint, came from the early Kimmeridgian Glowaczow Formation of Ozarow quarry. The track was discovered within the shallow-marine succession of calcareous deposits, which contributes to the interpretation of synsedimentary emersion of that area during the early Kimmeridgian.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New stratigraphic and isotope data on the Kimmeridgian-Volgian boundarybeds of the Subpolar Urals, Western Siberia
Autorzy:
Rogov, M. A.
Price, G. D.
Tematy:
Kimmeridgian
Volgian
ammonite biostratigraphy
belemnites
oxygen isotopes
Pokaż więcej
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Powiązania:
https://bibliotekanauki.pl/articles/2059041.pdf  Link otwiera się w nowym oknie
Opis:
A review and new data regarding the ammonite faunas and biostratigraphy of the uppermost Kimmeridgian-lowermost Volgian of theSubpolar Urals are presented. The combined ranges of almost all ammonite genera in the lowermost Volgian of the Subpolar Urals supports the traditional point of view regarding the equivalence of the Magnum Zone with the two lowermost Bolonian Zones and with thebulk of the Klimovi Zone. This stratigraphic interpretation permits the stable isotope data (carbon and oxygen) derived from associatedbelemnites to be presented in context. The isotopic records from the belemnites suggest that the lower Volgian sediments of the YatriaRiver, Subpolar Ural Mountains were deposited in a warm marine environment consistent with a warm high latitude scenario. If reducedsalinites are invoked apparent temperatures are lowered by ~5°C, but still remain well above freezing and are relatively warm comparedto some recent modelled estimates of Late Jurassic ocean temperatures.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Tracking Late Jurassic ornithopods in the Lusitanian Basin of Portugal: Ichnotaxonomic implications
Autorzy:
Castanera, D.
Silva, B.C.
Santos, V.F.
Malafaia, E.
Belvedere, M.
Tematy:
Iguanodontipodidae
Dinehichnus
Anomoepus-like
Kimmeridgian
Tithonian
Europe
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Powiązania:
https://bibliotekanauki.pl/articles/2082160.pdf  Link otwiera się w nowym oknie
Opis:
The Sociedade de História Natural in Torres Vedras, Portugal houses an extensive collection of as yet undescribed dinosaur tracks with ornithopod affinities. They have been collected from different Late Jurassic (Kimmeridgian–Tithonian) geological formations (Praia de Amoreira-Porto Novo, Alcobaça, Sobral, and Freixial) that outcrop along the Portuguese coast, and belong to two different sub-basins of the Lusitanian Basin (the Consolação and Turcifal sub-basins). Three main morphotypes can be distinguished on the basis of size, mesaxony and the morphology of the metatarsophalangeal pad impression. The minute to small-sized morphotype is similar to the Anomoepus-like tracks identified in other Late Jurassic areas. The small to medium-sized morphotype resembles the Late Jurassic–Early Cretaceous ichnotaxon Dinehichnus, already known in the Lusitanian Basin. Interestingly, these two morphotypes can be distinguished qualitatively (slightly different size, metatarsophalangeal pad impression and digit morphology) but are nevertheless difficult to discriminate by quantitatively analysing their length-width ratio and mesaxony. The third morphotype is considered a large ornithopod footprint belonging to the ichnofamily Iguanodontipodidae. This ichnofamily is typical for Cretaceous tracksites but the new material suggests that it might also be present in the Late Jurassic. The three morphotypes show a negative correlation between size and mesaxony, so the smaller tracks show the stronger mesaxony, and the larger ones weaker mesaxony. The Upper Jurassic ornithopod record from the Lusitanian Basin has yielded both small and medium-sized ornithopod remains, mainly iguanodontians such as dryosaurids and ankylopollexians, which are the main candidates to be the trackmakers.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kimmeridgian-Valanginian reef corals from the Moesian Platform from Bulgaria
Autorzy:
Roniewicz, E.
Tematy:
Scleractinia
Hexantiniaria
Kimmeridgian-Valanginian
Moesian Platform
Pokaż więcej
Wydawca:
Polskie Towarzystwo Geologiczne
Powiązania:
https://bibliotekanauki.pl/articles/191409.pdf  Link otwiera się w nowym oknie
Opis:
The coral fauna of the Late Kimmeridgian-Valanginian interval from the Slivnitsa Formation, Lyubash monocline, western part of the Moesian Platform, is presented. Coralliferous interbeds from a continuous, over 350 m thick sequence of well-bedded platform limestones, cropping out near the village of Lyalintsi, yielded 72 species (29 determined in open nomenclature) classified into 50 genera and 23 families belonging to the orders Scleractinia and Hexantiniaria. The following genera and/or species are described as new: Epistreptum communeformae gen. et sp.n., Lyubasha gracilis gen. et sp.n., Oedalmiopsis cretacea gen. et sp.n., Siderastreites lyalintsensis gen. et sp.n., Latomeandra obliqua sp.n., and Microphyllia elevata sp.n.; a new family Solenocoeniidae is erected. The fauna shows a mixed Late Jurassic/Early Cretaceous character, with Jurassic taxa pre- vailing over Cretaceous taxa. Epithecate phaceloid (pseudocolonial), lamellar, and ramose (colonial) growth forms dominate over massive (hemispherical) and solitary corals. Rich microencrusting organisms are associated. The predominantly pelmicritic sediment of thrombolite macrofabric, and the character of the fauna show that the palaeoenvironment was situated below wave base. The stratigraphical distribution of the Cretaceous coral taxa is conformable with the micropalaeontological (foraminifera, calcareous dinocysts, diploporids) stratigraphical zonation established in the Slivnitsa Formation.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ammonites from the Oxfordian-Kimmeridgian boundary and the Lower–Upper Kimmeridgian of Kachchh, western India
Autorzy:
Pandey, D.
Alberti, M.
Fürsich, F.
Głowniak, E.
Olóriz, F.
Tematy:
ammonites
Kachchh
India
Oxfordian-Kimmeridgian boundary
amonity
Indie
Pokaż więcej
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Powiązania:
https://bibliotekanauki.pl/articles/2061026.pdf  Link otwiera się w nowym oknie
Opis:
Several new specimens of ammonites from the Oxfordian and Kimmeridgian of Kachchh, western India, are described and illustrated. The Oxfordian ammonites ?Subdiscosphinctes Malinowska, Perisphinctes Waagen, Dichotomoceras Buckman, and ?Larcheria Tintant, all from Bharodia in the Wagad Uplift, enable tentative biochronostratigraphic correlations with the uppermost Middle Oxfordian up to the lower Upper Oxfordian of the unified Submediterranean zonation, whereas the Kimmeridgian ammonites Streblites Hyatt, “Orthosphinctes” Schindewolf, Torquatisphinctes Spath, Pachysphinctes Dietrich, Katroliceras Spath, Aspidoceras Zittel, and Schaireria Checa reconfirm a stratigraphic gap embracing incompletely known parts of the uppermost Oxfordian and the Lower Kimmeridgian as known from the ammonite records of the Kachchh Mainland of the Kachchh Basin.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Re-evaluation of pachycormid fishes from the Late Jurassic of Southwestern Germany
Autorzy:
Maxwell, E.E.
Lambers, P.H.
Lopez-Arabello, A.
Schweigert, G.
Tematy:
Actinopterygii
Pachycormidae
Lagerstätte
Mesozoic
Kimmeridgian
Bavaria
Nusplingen
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Powiązania:
https://bibliotekanauki.pl/articles/2082225.pdf  Link otwiera się w nowym oknie
Opis:
Pachycormidae is an extinct group of Mesozoic fishes that exhibits extensive body size and shape disparity. The Late Jurassic record of the group is dominated by fossils from the lithographic limestone of Bavaria, Germany that, although complete and articulated, are not well characterized anatomically. In addition, stratigraphic and geographical provenance are often only approximately known, making these taxa difficult to place in a global biogeographical context. In contrast, the late Kimmeridgian Nusplingen Plattenkalk of Baden-Württemberg is a well-constrained locality yielding hundreds of exceptionally preserved and prepared vertebrate fossils. Pachycormid fishes are rare, but these finds have the potential to broaden our understanding of anatomical variation within this group, as well as provide new information regarding the trophic complexity of the Nusplingen lagoonal ecosystem. Here, we review the fossil record of Pachycormidae from Nusplingen, including one fragmentary and two relatively complete skulls, a largely complete fish, and a fragment of a caudal fin. These finds can be referred to three taxa: Orthocormus sp., Hypsocormus posterodorsalis sp. nov., and Simocormus macrolepidotus gen. et sp. nov. The latter taxon was erected to replace “Hypsocormus” macrodon, here considered to be a nomen dubium. Hypsocormus posterodorsalis is known only from Nusplingen, and is characterized by teeth lacking apicobasal ridging at the bases, a dorsal fin positioned opposite the anterior edge of the anal fin, and a hypural plate consisting of a fused parhypural and hypurals. The holotype specimen contributes additional palaeobiological information, with small teleosteans preserved as gastric contents and ribs showing signs of callus formation. These new findings extend our knowledge of the anatomy and diversity of Pachycormidae, and represent an important first step in understanding factors controlling their distribution and morphological variation in the Late Jurassic of Europe.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The giant pliosaurid that wasn’t-revising the marine reptiles from the Kimmeridgian, Upper Jurassic, of Krzyzanowice, Poland
Autorzy:
Madzia, D.
Szczygielski, T.
Wolniewicz, A.S.
Tematy:
Pliosauridae
Metriorhynchidae
Crocodylomorpha
Thalassochelydia
Kimmeridgian
Jurassic
Polska
Pokaż więcej
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Powiązania:
https://bibliotekanauki.pl/articles/2082281.pdf  Link otwiera się w nowym oknie
Opis:
Marine reptiles from the Upper Jurassic of Central Europe are rare and often fragmentary, which hinders their precise taxonomic identification and their placement in a palaeobiogeographic context. Recent fieldwork in the Kimmeridgian of Krzyżanowice, Poland, a locality known from turtle remains originally discovered in the 1960s, has reportedly provided additional fossils thought to indicate the presence of a more diverse marine reptile assemblage, including giant pliosaurids, plesiosauroids, and thalattosuchians. Based on its taxonomic composition, the marine tetrapod fauna from Krzyżanowice was argued to represent part of the “Matyja-Wierzbowski Line”—a newly proposed palaeobiogeographic belt comprising faunal components transitional between those of the Boreal and Mediterranean marine provinces. Here, we provide a detailed re-description of the marine reptile material from Krzyżanowice and reassess its taxonomy. The turtle remains are proposed to represent a “plesiochelyid” thalassochelydian (Craspedochelys? sp.) and the plesiosauroid vertebral centrum likely belongs to a cryptoclidid. However, qualitative assessment and quantitative analysis of the jaws originally referred to the colossal pliosaurid Pliosaurus clearly demonstrate a metriorhynchid thalattosuchian affinity. Furthermore, these metriorhynchid jaws were likely found at a different, currently indeterminate, locality. A tooth crown previously identified as belonging to the thalattosuchian Machimosaurus is here considered to represent an indeterminate vertebrate. The revised taxonomy of the marine reptiles from Krzyżanowice, as well as the uncertain provenance of the metriorhynchid specimen reported from the locality, cast doubt on the palaeobiogeographic significance of the assemblage.
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Lower Kimmeridgian facies and sedimentary succession of a shallow-water coated-grain-dominated carbonate ramp of the northern peri-Tethyan shelf : an example from the Radomsko Folds (central Poland)
Autorzy:
Olchowy, Piotr
Krajewski, Marcin
Tematy:
Late Jurassic
carbonate ramp
Kimmeridgian
oncoids
lithofacies
Pokaż więcej
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Powiązania:
https://bibliotekanauki.pl/articles/2060146.pdf  Link otwiera się w nowym oknie
Opis:
An Upper Jurassic succession is exposed in the active Rogaszyn Quarry (Kodrąb area) located in the Radomsko Folds structure (central Poland). Six facies types were distinguished, comprising oolitic, oncolitic, biodetrital and pelitic limestones as well as marls and marly clays. Typical lithologies are limestones with coated grains deposited in shall ow-water, fore-shoal, shoal and lagoonal parts of a carbonate ramp. Three types of ooid and three types of oncoid were identified, which display several shapes and sizes, and a complex structure of cortices. The ooid types show micritic, radial-fibrous and mixed, micritic/radial-fibrous cortices. Type 1 oncoids comprise micritic or bioclastic nuclei enveloped by non-laminated or laminated micritic cortices. Type 2 oncoids are composed of micritic or bioclastic nuclei and laminated, fossil-bearing cortices covered by microbial envelopes. Type 3 oncoids are the largest of the oncoids observed, attaining cm-scale dimensions. These oncoids are formed of a Bacinella-dom i nated meshwork incorpo fating smaller ooids and oncoids, or they have bioclastic or micritic nuclei covered by complex cortices with micritic, laminated, fossil-bearing, Bacinella-dominated fabric and microbial envelopes. Boundaries between the specific types of cortical envelopes are usually sharp and accentuated by organic encrustations, elongated bioclasts or borings. Commonly found are chambers of the ichnogenus Entobia representing the boring traces of carbonate-excavating sponges and the cryptoendolithic foraminifer Troglotella incrustants. The complex cortices indicate different growth stages of oncoids at different conditions of currents and microbial activity. Carbonate deposition was accompanied by mixed siliciclastic-carbonate sedimentation resulting in multiple intercalated layers of marls and pelitic limestones as well as marly clays. The deposits exposed in the Rogaszyn Quarry as well as in the Kodrąb area are compared with the neighbouring Upper Jurassic deposits of the Szczerców area and the Sw margin of the Holy Cross Mts. (both central Poland). The successions from the Kodrąb area are generally similar to the Lower Kimmeridgian sequences known from adjacent areas, but with locally observed facies variability.
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-10 z 51

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