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Wyszukujesz frazę "Albian–Cenomanian" wg kryterium: Wszystkie pola

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    Wyświetlanie 1-18 z 18
    Tytuł:
    Isolated pliosaurid teeth from the Albian-Cenomanian (Cretaceous) of Annopol, Poland
    Autorzy:
    Madzia, D.
    Machalski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/139304.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Polyptychodon
    Plesiosauria
    Pliosauridae
    teeth
    albian
    cenomanian
    Annopol
    Polska
    plezjozaury
    uzębienie
    alb
    cenoman
    Polska
    Opis:
    Brachauchenine pliosaurids were a cosmopolitan clade of macropredatory plesiosaurs that are considered to represent the only pliosaurid lineage that survived the faunal turnover of marine amniotes during the Jurassic–Cretaceous transition. However, the European record of the Early to early Late Cretaceous brachauchenines is largely limited to isolated tooth crowns, most of which have been attributed to the classic Cretaceous taxon Polyptychodon. Nevertheless, the original material of P. interruptus, the type species of Polyptychodon, was recently reappraised and found undiagnostic. Here, we describe a collection of twelve pliosaurid teeth from the upper Albian–middle Cenomanian interval of the condensed, phosphorite-bearing Cretaceous succession at Annopol, Poland. Eleven of the studied tooth crowns, from the Albian and Cenomanian strata, fall within the range of the morphological variability observed in the original material of P. interruptus from the Cretaceous of England. One tooth crown from the middle Cenomanian is characterized by a gently subtrihedral cross-section. Similar morphology has so far been described only for pliosaurid teeth from the Late Jurassic and Early Cretaceous. Even though it remains impossible to precisely settle the taxonomic distinctions, the studied material is considered to be taxonomically heterogeneous.
    Źródło:
    Acta Geologica Polonica; 2017, 67, 3; 393-403
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The early angiosperm Pseudoasterophyllites cretaceus from Albian-Cenomanian of Czech Republic and France revisited
    Autorzy:
    Kvacek, J.
    Gomez, B.
    Zetter, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/22816.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    angiosperm
    Pseudoasterophyllites cretaceus
    Cenomanian Peruc Korycany Formation
    Czech Republic
    France
    Magnoliopsida
    Pseudoasterophyllites
    Tucanopollis
    Cretaceous
    Albian
    Cenomanian
    Bohemia
    paleontology
    Opis:
    The early halophytic angiosperm Pseudoasterophyllites cretaceus from the Cenomanian Peruc Korycany Formation of the Bohemian Cretaceous Basin and from the Late Albian of the Northern Aquitanian Basin is redescribed. The plant is characterized by semi−whorled linear, and heavily cutinized leaves with paracytic stomata. Stamens associated with P. cretaceus possess an apically emerging connective that possesses the same epidermal cell pattern as the leaves. The stamens are massive, tetrasporangiate, and contain Tucanopollis pollen, thus clearly indicating affinities of P. cretaceus to the basal angiosperms. The plants that co−occur with P. cretaceus in semi−autochtonous taphocoenoses include the conifer Frenelopsis alata, which was likely a halophyte or halo−tolerant glycophyte growing in habitats close to the sea.
    Źródło:
    Acta Palaeontologica Polonica; 2012, 57, 2
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stratigraphy of the Albian-Cenomanian (Cretaceous) phosphorite interval in central Poland: a reappraisal
    Autorzy:
    Machalski, Marcin
    Olszewska-Nejbert, Danuta
    Wilmsen, Markus
    Powiązania:
    https://bibliotekanauki.pl/articles/24024713.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    Polska
    Cretaceous
    phosphorites
    rare earth elements
    biostratigraphy
    sequence stratigraphy
    Polska
    kreda
    fosforyty
    metale ziem rzadkich
    REE
    biostratygrafia
    stratygrafia sekwencji
    Opis:
    Several closely-spaced phosphorite beds stand out at the Albian–Cenomanian transition in the mid-Cretaceous transgressive succession at the northeastern margin of the Holy Cross Mountains, central Poland. They form a distinctive condensed interval of considerable stratigraphical, palaeontological, and economic value. Here, we correlate the classical section at Annopol with a recently investigated section at Chałupki. We propose a new stratigraphic interpretation of the phosphorite interval, based on lithological correlations, Rare Earth Elements and Yttrium (REE+Y) signatures of phosphorites, age-diagnostic macrofossils, and sequence stratigraphic patterns. This interval has long been considered as exclusively Albian in age. However, new macrofossil data allow us to assign the higher phosphorite levels at Annopol and Chałupki, which were the primary target for the phosphate mining, to the lower Cenomanian. In terms of sequence stratigraphy, the phosphorite interval encompasses the depositional sequence DS Al 8 and the Lowstand System Tract of the successive DS Al/Ce 1 sequence. The proposed correlation suggests that lowstand reworking during the Albian–Cenomanian boundary interval played an important role in concentrating the phosphatic clasts and nodules to exploitable stratiform accumulations. Our conclusions are pertinent to regional studies, assessments of natural resources (in view of the recent interest in REE content of the phosphorites), and dating of the fossil assemblages preserved in the phosphorite interval. On a broader scale, they add to our understanding of the formation of stratiform phosphorite deposits.
    Źródło:
    Acta Geologica Polonica; 2023, 73, 1; 1--31
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Speeds of dinosaurs from the Albian-Cenomanian of Patagonia and sauropod stance and gait
    Autorzy:
    Mazzetta, G V
    Blanco, R E
    Powiązania:
    https://bibliotekanauki.pl/articles/20359.pdf
    Data publikacji:
    2001
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    paleoichnology
    dinosaur speed
    Rio Limay Formation
    gait
    Patagonia
    dinosaur
    sauropod stance
    Opis:
    Estimates of locomotory speeds of small to large-sized Patagonian dinosaurs are presented for the first time. These estimates are inferred from trackways found on fine to coarse-grained brown sandstones located in the lower section of the Candeleros Member of the Río Limay Formation (Albian-Cenomanian), Neuquén Province, Argentina. The method used is based on the measurement of the stride length (distance between two successive prints of the same foot) and of the length of the hindfoot print, which in turn, allows us to estimate the height at the hip joint and, therefore, the approximate size of the animal. The hypothesis of dynamic similarity implies that the movements of geometrically similar animals, although of different sizes, are dynamically similar only when they move with the same Froude number. The dynamically similar movements (i.e., those with equal Froude number) require equal values of relative stride length (ratio between the stride length and the hip joint height). The relationship between the relative stride length and the Froude number allows us to estimate the speeds of dinosaurs. The dinosaurian ichnofauna studied reveals low speeds that range from 0.5 to 2.6 m s⁻¹. Our analyses show that the sauropods responsible for these trackways were either walking very slowly in a bipedal stance or alternatively they were progressing quadrupedally on a slippery surface.
    Źródło:
    Acta Palaeontologica Polonica; 2001, 46, 2
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stratigraphy of the Albian-Cenomanian boundary interval in the Agadir Basin, Morocco: ammonites, microcrinoids, planktonic foraminifera
    Autorzy:
    Gale, Andrew Scott
    Kennedy, William James
    Petrizzo, Maria Rose
    Powiązania:
    https://bibliotekanauki.pl/articles/2024048.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Albian/Cenomanian boundary
    Agadir
    planktonic foraminifera
    ammonites
    granica alb/cenoman
    otwornice planktoniczne
    amonity
    Opis:
    The uppermost Albian and lowermost Cenomanian succession at Abouda Plage, north of Agadir, in the Agadir Basin, western Morocco, is described in detail, and ammonites, microcrinoids and planktonic foraminifera are recorded and illustrated. The lower part of the Aït Lamine Formation yields ammonites indicative of the Pervinquieria (Subschloenbachia) rostrata and P. (S.) perinflata ammonite zones, and the Thalmanninella appenninica planktonic foraminiferan Zone. The base of the Cenomanian is identified at 42.2 m above the base of the Aït Lamine Formation, based on the lowest occurrence of the planktonic foraminiferan Thalmanninella globotruncanoides Sigal, 1948. Lower Cenomanian ammonites of the Graysonites adkinsi Zone enter 3 m higher in the succession. Microcrinoid zones AlR11 and AlR12 are identified in the Upper Albian, and the base of the CeR1 Zone coincides with the lowest occurrence of Cenomanian ammonites. The ammonite and microcrinoid occurrences and detailed distributions are very similar to those found in north central Texas, which, in the Cenomanian, was 5,300 km to the west. The new records suggest that the G. adkinsi Zone is equivalent to the uppermost (Lower Cenomanian) part of the Pleurohoplites briacensis Zone of the Global Stratotype Section for the base of the Cenomanian stage. An hiatus, of global extent, immediately underlies the base of the G. adkinsi Zone and is represented in the Agadir Basin by an erosion surface containing bored and encrusted hiatus concretions.
    Źródło:
    Acta Geologica Polonica; 2021, 71, 4; 453--480
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evidence of bacteriogenic iron and manganese oxyhydroxides in Albian-Cenomanian marine sediments of the Carpathian realm (Poland)
    Autorzy:
    Bąk, M.
    Bąk, K.
    Górny, Z.
    Stożek, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/191443.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    iron
    manganese
    iron-related bacteria
    Albian–Cenomanian
    Silesian Nappe
    Tatra Mts.
    Carpathians
    Opis:
    The Albian and Cenomanian marine sediments of the Silesian and Tatric basins in the Carpathian realm of the Western Tethys contain ferric and ferromanganese oxyhydroxides, visible macroscopically as brown stainings. They coat calcareous bioclasts and mineral clasts, fill pore spaces, or locally form continuous, parallel microlayers, tens of micrometers thick. Light-microscope (LM) and scanning-electron-microscope (SEM) obser- vations show that the coatings contain elongated capsules, approximately 3–5 µm across and enriched in iron and manganese, which may be remnants of the original sheaths of iron-related bacteria (IRB). Moreover, the ferric and ferromanganese staining observed under LM is similar to bacterial structures, resembling the sheaths, filaments and rods formed by present-day bacteria of the Sphaerotilus–Leptothrix group. All of the possible bacteria-like structures are well preserved owing to processes of early diagenetic cementation. If the observed structures are fossil IRB, these organisms could have played an important role in iron and manganese accumulation on the sea floor during Albian–Cenomanian time. The most plausible source of metals for bacterial concentration in the Silesian Basin might have been submarine low-temperature hydrothermal vents, as previously was hypothesized for Cenomanian–Turonian deposits on the basis of geochemical indices.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2015, 85, 2; 371-385
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Upper Albian, Cenomanian and Upper Turonian ammonite faunas from the Fahdène Formation of Central Tunisia and correlatives in northern Algeria
    Autorzy:
    Kennedy, William James
    Powiązania:
    https://bibliotekanauki.pl/articles/138843.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Ammonites
    Cretaceous
    Albian
    Cenomanian
    Turonian
    Algeria
    Tunisia
    amonity
    kreda
    Alb
    cenoman
    Turon
    Algieria
    Tunezja
    Opis:
    Over 130 species are documented from the Upper Albian, Cenomanian and Upper Turonian Fahdène Formation and correlatives in Central Tunisia and northern Algeria, based on material described by Henri Coquand (1852, 1854, 1862, 1880), Léon Pervinquière (1907, 1910), Georges Dubourdieu (1953), Jacques Sornay (1955), and new collections. The material consists predominantly of limonitic nuclei, together with adults of micromorphs. There is no continuous record, and a series of faunas are recognised that can be correlated with the zonation developed in Western Europe. These are the Upper Albian Ostlingoceras puzosianum fauna, Lower Cenomanian Neostlingoceras carcitanense and Mariella (Mariella) harchaensis faunas, the upper Lower to lower Middle Cenomanian Turrilites scheuchzerianus fauna, Middle Cenomanian Calycoceras (Newboldiceras) asiaticum fauna, Upper Cenomanian Eucalycoceras pentagonum fauna, and the Upper Turonian Subprionocyclus neptuni fauna. Two new micromorph genera are described, Coquandiceras of the Mantelliceratinae and Cryptoturrilites of the Turrilitinae. Most of the taxa present have a cosmopolitan distribution, with a minority of Boreal, North American and endemic taxa.
    Źródło:
    Acta Geologica Polonica; 2020, 70, 2; 147-272
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Upper Albian, Cenomanian and Lower Turonian stratigraphy, ammonite and inoceramid bivalve faunas from the Cauvery Basin, Tamil Nadu, South India
    Autorzy:
    Gale, Andrews S.
    Kennedy, William J.
    Walaszczyk, Ireneusz
    Powiązania:
    https://bibliotekanauki.pl/articles/139419.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Cretaceous
    Ammonites
    inoceramid bivalves
    sequence stratigraphy
    South India
    kreda
    amonity
    małże inoceramidowe
    stratygrafia sekwencyjna
    Indie Południowe
    Opis:
    The lithostratigraphy, biostratigraphy, sequence stratigraphy, ammonite and inoceramid faunas of the Upper Albian, Cenomanian, and Lower Turonian Karai Formation, the highest unit of the Uttatur Group in the Pondicherry Sub-Basin of the Cauvery Basin in Tamil Nadu, south India, are documented. Detailed logs and descriptions of sections between Karai and Kulakkalnattam, Odiyam and Kunnam, and north-west of Garudamangalam are presented. They provide the evidence for an ammonite zonal scheme that can be correlated in detail with sequences developed in Europe, with successive Upper Albian zones of Pervinquieria (Subschloenbachia) rostrata and P. (S.) perinflata (the latter on slight evidence), Cenomanian zones of Mantelliceras mantelli, Cunningtoniceras cunningtoni, Calycoceras (Newboldiceras) asiaticum, Pseudo calycoceras harpax, Euomphaloceras septemseriatum and Pseudspidoceras footeanum. The Lower Turonian is represented by a Neoptychites cephalotus–Mytiloides borkari fauna. Over 120 ammonite species are described, of which Puzosia (Bhimaites) falx, Protacanthoceras parva, Watinoceras elegans, Euomphaloceras varicostatum, Kamerunoceras multinodosum, and Carthaginites multituberculatus are new. The new genus Kunnamiceras, with Ammonites tropicus Kossmat, 1865 as type species, is interpreted as a paedomorphic dwarf derivative of Pseudocalycoceras harpax (Stoliczka, 1864). Ammonite faunas from shales are dominated by feebly-ornamented taxa: leiostraca; those from sandstones by strongly ornamented taxa: trachyostraca, differences interpreted as reflecting the preferred habits of adults in life. 15 species of inoceramid bivalves, including a newly described species Inoceramus chiplonkari, are recognised, with a mixed East African–Euramerican–North Pacific affinity. On the basis of the stratigraphic framework developed, a sequence stratigraphic interpretation of the Karai Formation is proposed, and correlated with those recognised in Europe, Morocco, and the United States Gulf Coast and Western Interior.
    Źródło:
    Acta Geologica Polonica; 2019, 69, 2; 161-338
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Foraminiferal and radiolarian biostratigraphy of the youngest (Late Albian through Late Cenomanian) sediments of the Tatra massif, Central Western Carpathians
    Autorzy:
    Bąk, K.
    Bąk, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/138987.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Albian–Cenomanian
    Tatra massif
    biostratigraphy
    foraminifera
    radiolaria
    alb
    cenoman
    Tatry
    masyw
    biostratygrafia
    otwornice
    promienice
    Opis:
    The foraminiferal and radiolarian biostratigraphy of selected sections of the Zabijak Formation, the youngest sediments of the Tatra massif (Central Western Carpathians), have been studied. Benthic foraminifers, mainly agglutinated species, occur abundantly and continuously throughout the studied succession, while planktic foraminifers are generally sparse. Five planktic and two benthic foraminiferal zones have been recognized. The marly part of the Zabijak Formation comprises the Pseudothalmanninella ticinensis (Upper Albian) through the Rotalipora cushmani (Upper Cenomanian) planktic foraminiferal zones, and the Haplophragmoides nonioninoides and Bulbobaculites problematicus benthic foraminiferal zones. The radiolarians were recognized exclusively in the Lower Cenomanian part of the formation.
    Źródło:
    Acta Geologica Polonica; 2013, 63, 2; 223-237
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Cretaceous (Aptian/Albian-?Cenomanian) age of “black flysch” and adjacent deposits of the Grajcarek thrust-sheets in the Male Pieniny Mts. (Pieniny Klippen Belt, Polish Outer Carpathians)
    Autorzy:
    Oszczypko, N.
    Olszewska, B.
    Malata, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/2059409.pdf
    Data publikacji:
    2012
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    black flysch
    Cretaceous
    foraminifera
    Pieniny Klippen Belt
    Opis:
    Several sections record the relation between the “black flysch” and Upper Cretaceous red shales in the Grajcarek thrust-sheets. In all the sections studied the “black flysch” appears in the core of imbricated folds or thrust-sheets, whereas the limbs are composed of Upper Cretaceous deposits. The transitional beds between the “ black flysch” and the Upper Cretaceous red shales are composed of green and black bituminous shales, green and red radiolarites and cherty limestones. Biostratigraphical investigations have revealed a similar type and sequence of microfauna assemblages in all the sections studied and significant redeposition of Jurassic calcareous benthic foraminifera, calcareous nannoplankton, molluscs, sponge spicules and crinoid elements. The Cretaceous age (Aptian/Albian-?Cenomanian) of the “black flysch” is shown by the presence of agglutinated foraminifera and microfacies data. These deposits are underlain by a Kimmeridgian-Aptian radiolarite/limestone condensed succession and overlain by Turonian-Campanian hemipelagic red shales and Maastrichtian/Lower Paleocene conglomerates and thick-bedded silicilastic turbidites of the Jarmuta Formation. Such a sequence of deposits is typical of the Outer Carpathian basins and records the global Mid/Late Cretaceous phenomena in the world ocean, followed by the Cretaceous Oceanic Red Beds.
    Źródło:
    Geological Quarterly; 2012, 56, 3; 411--440
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Albian, Cenomanian and Turonian foraminifers of Poland and their stratigraphic importance
    Otwornice albu, cenomanu i turonu Polski i ich znaczenie stratygraficzne
    Foraminifery alba, cenomana i turona Polshi i ikh ctratigraficheskoe znachenie
    Autorzy:
    Gawor-Biedowa, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/20850.pdf
    Data publikacji:
    1972
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Źródło:
    Acta Palaeontologica Polonica; 1972, 17, 1
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Upper Albian and Cenomanian (Cretaceous) ammonites from the Debarsu Formation (Yazd Block, Central Iran)
    Autorzy:
    Wilmsen, M.
    Storm, M.
    Fürsich, F. T.
    Majidifard, M. R.
    Powiązania:
    https://bibliotekanauki.pl/articles/139149.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Mid-Cretaceous
    Central-East Iranian Microcontinent
    taxonomy
    biostratigraphy
    ammonites
    kreda
    taksonomia
    biostratygrafia
    amonity
    Iran
    Opis:
    New ammonite faunas consisting of 13 taxa provide the first reliable biostratigraphic dating of the Debarsu Formation of the Yazd Block, west-central Iran, indicating several levels in the Upper Albian and Lower Cenomanian, while a foraminiferal assemblage places the top of the Formation in the Middle Turonian. Among the identified ammonite taxa, Acompsoceras renevieri (Sharpe, 1857) is recorded from Iran for the first time. The upper part of the lower Upper Albian is proved by the occurrences of mortoniceratines of the Mortoniceras (M.) inflatum Zone in the lowermost part of the Debarsu Formation. For the upper Upper Albian (traditional Stoliczkaia dispar Zone), the M. (Subschloenbachia) rostratum and M. (S.) perinflatum zones are proved by their index taxa. However, there is no evidence of the terminal Arrhaphoceras (Praeschloenbachia) briacensis Zone. The upper part of the lower Lower Cenomanian Mantelliceras mantelli Zone (M. saxbii Subzone) is proved by M. saxbii and M. cf. mantelli. Below, there is an ammonite-barren interval of ca. 100 m in thickness between M. (S.) perinflatum zonal strata and the M. saxbii Subzone. The upper Lower Cenomanian is documented by the presence of typically M. dixoni zonal ammonites such as Acompsoceras renevieri. Upper Cenomanian and Turonian ammonites have not been found in the upper part of the Debarsu Formation, but micro-biostratigraphic evidence (planktonic foraminifers) from the uppermost part of the formation indicate that the formation ranges into the Turonian. For the development of the major tectonic unconformity at the base of the overlying Haftoman Formation (which yielded Lower Coniacian inoceramids near its base), only 2–3 myr remain, stressing the geodynamic activity of Central Iran during mid-Cretaceous times.
    Źródło:
    Acta Geologica Polonica; 2013, 63, 4; 489-513
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Provenance of Albian to Cenomanian exotics-bearing turbidites in the Western Carpathians : a heavy mineral analysis
    Autorzy:
    Aubrecht, Roman
    Bellová, Simona
    Mikuš, Tomáš
    Powiązania:
    https://bibliotekanauki.pl/articles/2060270.pdf
    Data publikacji:
    2020
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    ophiolites
    Cr-spinel
    blue amphibole
    tourmaline
    pyroxene
    Cretaceous palaeogeography
    Opis:
    Throughout the Cretaceous, Tethyan oceanic branches gradually closed, and various ophiolites became obducted and eroded. Their remnants, however, provide an abundance of exotic clasts of unknown origin. Sandstone samples from the oldest, Albian exotics-bearing strata of the Pieniny Klippen Belt and Central Western Carpathians were analysed for heavy minerals. These samples were dominated by a high content of chrome-spinels, zircon, tourmaline, apatite and rutile. Titanite, kyanite, monazite, epidote, sillimanite and staurolite were much less abundant. Garnet was generally also rare; however, it was locally common, as were blue amphiboles, pyroxenes and kyanite. The spinels found in the samples were predominantly derived from harzburgites (supra-subduction peridotites and volcanic rocks). The blue amphiboles represented glaucophanes to ferroglaucophanes, and were derived from HP/LT metabasites. Pyroxenes (enstatite, less commonly augite and diopside) most likely came from coeval volcanics. Most of the tourmalines were derived from metasedimentary rocks and locally from granitoids. Furthermore, some have a complex zonation with two phases of tourmaline, or tourmaline intergrown with quartz. These were likely derived from ophiolitic sources. The results from our analysis indicate a dominance of ophiolites and older sediments with local input of continental crust metamorphic rocks. A resulting palaeogeographic reconstruction involves secondary doubling of the Neotethys suture zone and its lateral shift north of the Central Western Carpathians, which formed a common source for exotics in the Pieniny Klippen Belt and the Central Western Carpathians.
    Źródło:
    Geological Quarterly; 2020, 64, 3; 658--680
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wzbogacenie w REE utworów osadowych w wybranych rejonach obrzeżenia mezozoicznego Gór Świętokrzyskich : obiecujące dane wstępne i potrzeba dalszych badań
    REE enrichment of sedimentary formations in selected regions of the Mesozoic margin of the Holy Cross Mountains : promising preliminary data and more research needed
    Autorzy:
    Mikulski, Stanisław Z.
    Brański, Paweł
    Pieńkowski, Grzegorz
    Małek, Rafał
    Zglinicki, Karol
    Chmielewski, Andrzej
    Powiązania:
    https://bibliotekanauki.pl/articles/2076190.pdf
    Data publikacji:
    2021
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    rzadkie elementy ziemi
    osady krzemoklastyczne
    górny trias
    dolna jura
    fosforyty dolnokredowe
    fosforyty albsko-cenomańskie
    rare earth elements
    siliciclastic deposits
    Upper Triassic
    Lower Jurassic
    Lower Cretaceous phosphorites
    Albian-Cenomanian phosphorites
    Opis:
    The main task of research was a quantitative and qualitative identification of rare earth elements within various Mesozoic sediments in the surroundings of the Holy Cross Mountains. Over 100 samples from archive boreholes, outcrops and mining waste were analysed using modern methods, like portable XRF, geochemical analysis (ICP-MS), electron microprobe and SEM. Results show enrichments of REE concentrations in sedimentary rock samples from the Niektań PIG-1 borehole (LREE up to 0.95%), Miedary outcrop (LREY up to 0.4%) and Lower Cretaceous phosphorites from mining waste in Chałupki and Annopol (LREE ~0.2%). Further investigation is strongly recommended in order to explain the distribution of REE in the study areas.
    Źródło:
    Przegląd Geologiczny; 2021, 69, 6; 379--385
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Pebbles of siliceous clastics and siliceous rocks in conglomerates of flysch sequences (Albian, Cenomanian) in vicinity of the Povażska Bystrica town, Klape Unit, Pieniny Klippen Belt, Western Carpathians
    Otoczaki klastycznych utworów krzemionkowych i skał krzemionkowych w zlepieńcach sekwencji fliszowych (alb, cenoman) w okolicy Povażskiej Bystricy, jednostka klapska, pieniński pas skałkowy, Karpaty Zachodnie
    Autorzy:
    Zat'ko, F.
    Sykora, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/183553.pdf
    Data publikacji:
    2006
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    otoczaki klastycznych skał krzemionkowych
    silicyty
    petrografia
    zlepieńce kredowe
    Pieniński Pas Skałkowy
    Karpaty Zachodnie
    pebbles of siliceous clastic rocks
    silicites
    petrography
    Cretaceous conglomerates
    Pieniny Klippen Belt
    Western Carpathians
    Opis:
    Pebbles of siliceous clastic rocks were not particularly petrographically studied so far in the Cretaceous exotic conglomerates of the Western Carpathians. They occur in polymictic conglomerates representing sediments of gravity flows. The pebbles of clastic rocks are known continuously in many places of the Pieniny Klippen Belt (PKB). Their average content in the conglomerates is up to 25%. Analysed were mainly pebbles of sandstones and conglomerates. According to degree of mineralogical maturity, diagenesis and sometimes low degree of metamorphism we infer their pre--Mesozoic age. No fossils were found in the examined rocks. Some of them were turmalinized. Except of clastic sediments, radiolarites, lydites (rarely with silicified plant tissue), and jaspers were identified. According to microscopic study, the siliceous sandstones and conglomerates mostly consist of quartz, feldspars, lithoclasts, heavy minerals and matrix (often chloritic). Their compositons were plotted in triangular diagrams Q-F-L (Quartz, Feldspars, Lithoclasts). The diagrams were compared with the diagrams of similar clastic rocks which are known from the sequences of Tatricum, Veporicum, Hronicum and Gemericum. The diagrams of clastic rocks of the Pieniny Klippen Belt conglomerates are apparently different from those of clastic rocks of the Central and Inner Western Carpathians
    Otoczaki egzotykowych skał krzemionkowych Karpat Zachodnich nie były do tej pory obiektem badań petrograficznych. Występują one w kredowych zlepieńcach polimiktycznych spływów grawitacyjnych i znajdywane są w wielu miejscach pienińskiego pasa skałkowego (PKB). Udział tych egzotyków w zlepieńcach może dochodzić do 25%, przy czym niektóre z nich są sturmalinizowane. Analizie poddano głównie otoczaki piaskowców i zlepieńców. Przy braku jakichkolwiek skamieniałości, w nawiązaniu do stopnia mineralogicznej dojrzałości otoczaków, stopnia diagenezy, jak również słabego metamorfizmu autorzy sugerują ich przedmezozoiczny wiek. W oparciu o badania mikroskopowe stwierdzono, że piaskowce i zlepieńce krzemionkowe zawierają głównie kwarc, skalenie, minerały ciężkie i niezidentyfikowane litoklasty, tkwiące w matriksie, często o charakterze chlorytowym. Sporadycznie występują fragmenty radiolarytów, lidytów (rzadko ze skrzemionkowanymi fragmentami flory) i jaspisy. Skład badanych egzotyków przedstawiono na diagramach trójkątnych (Q, F, L). Diagramy te były z kolei porównywane z diagramami sporządzonymi dla podobnych utworów klastycznych znanych z sekwencji Tatricum, Weporicum, Hronicum i Gemericum, co doprowadziło do wniosku, że egzotyki tego typu z PKB są zupełnie różne od utworów klastycznych Karpat Centralnych i Zachodnich
    Źródło:
    Geologia / Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie; 2006, 32, 1; 65-77
    0138-0974
    Pojawia się w:
    Geologia / Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The microcrinoid taxonomy, biostratigraphy and correlation of the upper Fredericksburg and lower Washita groups (Cretaceous, middle Albian to lower Cenomanian) of northern Texas and southern Oklahoma, USA
    Autorzy:
    Gale, Andrew Scott
    Rashall, Jenny Marie
    Kennedy, William James
    Holterhoff, Frank Koch
    Powiązania:
    https://bibliotekanauki.pl/articles/1835606.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Roveacrinida
    integrated biostratigraphy
    ammonites
    planktonic foraminifera
    biostratygrafia
    amonity
    otwornice planktoniczne
    Opis:
    The stratigraphy of the upper Fredericksburg and lower Washita groups of northern Texas and southern Oklahoma is described, and biostratigraphical correlation within the region, and further afield, using micro-crinoids, ammonites, planktonic foraminiferans and inoceramid bivalves is summarised. The taxonomy of the roveacrind microcrinoids is revised by the senior author, and a new genus, Peckicrinus, is described, with the type species Poecilocrinus porcatus (Peck, 1943). New species include Roveacrinus proteus sp. nov., R. morganae sp. nov., Plotocrinus reidi sp. nov., Pl. molineuxae sp. nov., Pl. rashallae sp. nov. and Styracocrinus thomasae sp. nov. New formae of the genus Poecilocrinus Peck, 1943 are Po. dispandus forma floriformis nov. and Po. dispandus forma discus nov. New formae of the genus Euglyphocrinus Gale, 2019 are E. pyramidalis(Peck, 1943) forma pyramidalis nov., E. pyramidalis forma radix nov. and E. pyramidalis forma pentaspinusnov. The genera Plotocrinus Peck, 1943, Poecilocrinus and Roveacrinus Douglas, 1908 form a branching phylogenetic lineage extending from the middle Albian into the lower Cenomanian, showing rapid speciation, upon which a new roveacrinid zonation for the middle and upper Albian (zones AlR1-12) is largely based. Outside Texas and Oklahoma, zone AlR1 is recorded from the lower middle Albian of Aube (southeastern France) and zones AlR11-CeR2 from the Agadir Basin in Morocco and central Tunisia. It is likely that the zonation will be widely applicable to the middle and upper Albian and lower Cenomanian successions of many other regions.
    Źródło:
    Acta Geologica Polonica; 2021, 71, 1; 1-52
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Late Albian to early/mid - Cenomanian ostracodes from Northern Galala Plateau, Egypt
    Późnoalbskie - wczesno/środkowocenomańskie małżoraczki z Płaskowyżu Pólnocnej Galali (Egipt)
    Autorzy:
    Sczechura, J.
    Abd-Elshafy, E.
    Babinot, J.-F.
    Powiązania:
    https://bibliotekanauki.pl/articles/21037.pdf
    Data publikacji:
    1991
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Opis:
    Middle Cretaceous ostracodes from two sections in the Northern Galala Plateau, western coastal Gulf of Suez (Egypt) are presented. 30 species have been recorded, of which 4 are new: Asciocythere galalaensis, Perissocytheridea ignota, Eocytheropteron pecteniferum and ?Spinoleberis calcalifera. Most of the species have been known so far from the Albian and/or Cenomanian of the South Tethys, especially the Near East. No species common for these ages from the North and South Tethys i.e. Africa and Europe, have been found. Ostracode associations probably show the late Albian to early/mid-Cenomanian age. The distribution is related to fluctuating conditions within the studied area, from euhaline to brackish/shallow water environments.
    Opracowano małżoraczki z osadów środkowej kredy, występujących na zachodnim brzegu Zatoki Suezkiej (Egipt). Małżoraczki pochodzą z dwóch odsłonięć (Ras El Abd i Khashm El Galala) (figs. 1—3) z osadów, których dolna część zaliczana jest do facji Piaskowców. Nubijskich, a górna część — do formacji Galala. W oparciu o otwornice Abd-Elshafy i Atta (w druku a, b) zaliczyli dolną część osadów do dolnego cenomanu natomiast górną do górnego cenomanu. Opisano 30 gatunków małżoraczków, w tym 4 nowe: Asciocythere galalaensis, Perissocytheridea ignota, Eocytheropteron pecteniferum i Spinoleberis calcalifera. Analiza ilościowego i jakościowego rozprzestrzenienia małżoraczków pozwoliła wydzielić 2 zespoły (jeden zdominowany przez Cytherella, drugi zdominowany przez Perissocytheridea), występujące przemiennie w badanych profilach (fig. 4) i pozwalające wydzielić 4 ekozony. Uważa się, że wydzielone ekozony są odbiciem fluktuacji w zasoleniu, dynamice i głębokości zbiornika; ekozona z wyraźną obecnością Cytherella odpowiada środowisku morskiemu (euhalinowemu), natomiast ekozona z Perissocytheridea charakteryzuje środowisko brakiczne. Wyróżnione ekozony pokrywają się w znacznym stopniu z biozonami wyróżnionymi w badanych odsłonięciach w oparciu o otwornice (Abd-Elshafy i Atta, w druku b). Małżoraczki sugerują jednak nieco starszy wiek osadów (figs. 2, 3), tj. górnoalbski — wczesno/środkowocenomański. Uznaje się, że ekozona 1 (w oparciu o małżoraczki zaliczona do albu) reprezentuje środowisko regresywne, natomiast ekozona 2 (?3) (na podstawie małżoraczków zaliczona do cenomanu) wyraża stopniowe tendencje w kierunku otwartego morza. Sugerowane tendencje w rozwoju środowiska środkowokredowego są w zgodzie z proponowanymi „krzywymi transgresji-regresji” dotyczącymi albu-turonu na Środkowym i Dalekim Wschodzie opracowanymi przez Riché i Přestat (1980). Z rozprzestrzenienia regionalnego badanych małżoraczków wynika, że są one ograniczone do Afryki północnej i Bliskiego Wschodu, wykazując większe podobieństwo do synchronicznych małżoraczków z tego drugiego obszaru. Należą one zatem do północnoafrykańsko-bliskowschodniej prowincji małżoraczkowej wydzielonej przez Babinot (1985).
    Źródło:
    Acta Palaeontologica Polonica; 1991, 36, 1
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The stratigraphy of the mid Cretaceous (Albian) Upper Greensand Formation of the Wessex Basin and South West England, UK
    Autorzy:
    Gallois, R.
    Owen, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/139028.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    stratigraphy
    Upper Greensand Formation
    Cretaceous
    Devon
    Dorset
    Wessex
    Albian Stage
    Cenomanian Stage
    sequence stratigraphy
    stratygrafia
    formacja
    kreda
    dewon
    alb
    cenoman
    Opis:
    The Upper Greensand Formation, mostly capped by the Chalk, crops out on the edges of a broad, dissected plateau in Devon, west Dorset and south Somerset and has an almost continuous outcrop that runs from the Isle of Purbeck to the Vale of Wardour in south Wiltshire. The Formation is well exposed in cliffs in east Devon and the Isle of Purbeck, but is poorly exposed inland. It comprises sandstones and calcarenites with laterally and stratigraphically variable amounts of carbonate cement, glauconite and chert. The sedimentology and palaeontology indicate deposition in marginal marine-shelf environments that were at times subject to strong tidal and wave-generated currents. The formation of the Upper Greensand successions in the region was influenced by penecontemporaneous movements on major fault zones, some of which are sited over E-W trending Variscan thrusts in the basement rocks and, locally, on minor faults. Comparison of the principal sedimentary breaks in the succession with the sequence boundaries derived from world-wide sea-level curves suggests that local tectonic events mask the effects of any eustatic changes in sea level. The preserved fauna is unevenly distributed, both laterally and stratigraphically. Bivalves, gastropods and echinoids are common at some horizons but are not age-diagnostic. Ammonites are common at a few stratigraphically narrowly defined horizons, but are rare or absent throughout most of the succession. As a result, the age of parts of the succession is still poorly known.
    Źródło:
    Acta Geologica Polonica; 2018, 68, 2; 161-180
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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