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    Wyświetlanie 1-8 z 8
    Tytuł:
    Temporal facies and diagenetic evolution of the mixed siliciclastic-carbonate Jajiya Member (Callovian–Oxfordian), Jaisalmer Formation, West India
    Autorzy:
    Bhat, G. M.
    Ahmat, A. H. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2061017.pdf
    Data publikacji:
    2013
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    temporal facies analysis
    diagenesis
    facies
    Jaisalmer Formation
    West India
    Jajiya Member
    Callovian-Oxfordian
    analiza czasowa facji
    diageneza
    facje
    Formacja Jaisalmer
    Indie Zachodnie
    Opis:
    Three broad lithofacies – bioturbated packstone- to rudstone, calcareous sandstone and cross-bedded rudstone to packstone are recognized within the Jajiya Member. The facies architecture and stalking pattern suggests deposition related to TST, HST and TST events punctuated by MFZ events in sequence stratigraphic terms. The 11.4 m thick sequence represents two fining upward and three coarsening upward cycles representing bar-bank depositional settings. The framework constituents of these facies were mainly controlled by the depositional conditions through space and time and have greatly influenced their diagenetic evolution. The main diagenetic features observed within the facies include compaction, early cementation and porosity reduction, micritization and neomorphism representing early or syn-depositional and post-depositional changes. Two phases of early mechanical compaction have largely governed porosity development in these facies. However, cementation, micritization and neomorphism have also contributed significantly in this respect. Evidence suggests that marine phreatic and fresh water phreatic environments dominated the diagenetic evolution of these facies. Calcite cementation was first formed, followed by iron oxide, while silica cementation occurred probably at a late stage.
    Źródło:
    Volumina Jurassica; 2013, 11, 1; 147--162
    1896-7876
    1731-3708
    Pojawia się w:
    Volumina Jurassica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A review of the Lower - lowermost Upper Jurassic facies and stratigraphy of the Jaisalmer Basin, western Rajasthan, India
    Autorzy:
    Pandey, D.
    Choudhary, S.
    Bahadur, T.
    Swami, N.
    Poonia, D.
    Sha, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2061007.pdf
    Data publikacji:
    2012
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    facies
    lithostratigraphy
    Jurassic
    Jaisalmer Basin
    India
    facje
    litostratygrafia
    jura
    Indie
    Opis:
    The Lower - lowermost Upper Jurassic (up to Oxfordian) sedimentary succession of the Jaisalmer Basin on the Rajasthan Shelf is characterized by gradual lateral and rapid temporal facies variations, the existence of condensed sequences in certain horizons, and rich and highly diverse faunal contents. Lithostratigraphically, these Jurassic rocks of the basin have been grouped into the Lathi and Jaisalmer formations and the lower part of the Baisakhi Formation. The facies consist of (i) cross-bedded medium- to coarse-grained sandstone, (ii) cross-bedded to thinly laminated silt to fine-grained sandstone, (iii) silty marl, (iv) calcareous mud- to grainstone and sandy rudstone, (v) thinly laminated carbonaceous shale and (vi) conglomerate. These represent fluvial, floodplain, lacustrine, protected marginal marine, and shoreface to shelf environments. There are several marker units, which allow the making of intrabasinal lithostratigraphic correlations; however, a lack of knowledge of the detailed stratigraphic successions within individual lithostratigraphic units makes difficult a precise intra-basinal stratigraphic correlation. The present review provides a summary of the lithostratigraphy established by previous workers on the Lower - lowermost Upper Jurassic (up to Oxfordian) rocks of the Jaisalmer Basin, incorporating additional data, with a detailed stratigraphic succession within each lithostratigraphic unit, and more faunal elements recently.
    Źródło:
    Volumina Jurassica; 2012, 10, 1; 61--82
    1896-7876
    1731-3708
    Pojawia się w:
    Volumina Jurassica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dynamika rozwoju utworów koralowych środkowego oksfordu okolic Bałtowa
    Middle Oxfordian coral facies of the Bałtów region, NE margin of the Holy Cross Mts, Poland
    Autorzy:
    Gutowski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/2077305.pdf
    Data publikacji:
    2004
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    rafa
    utwory koralowe
    Bałtów
    coral facies
    reefs
    syndepositional activity of extensional blocks
    Opis:
    Coral facies developed on the Middle Oxfordian carbonate ramp were controlled in the region of Bałtów, NE margin of the Holy Cross Mts., Poland, by syndepositional activity of extensional fault blocks. Elevated parts of sea bottom were occupied since Early Oxfordian time by sponge bioherms successively colonized by coral reefs when grown up to the sea level. Micritic sedimentation prevailed in interbioherm denivelations. This micritic succession was replaced by soft-bottom coral buildups constructed by flat coral colonies, typical of a relatively quiet environment of the depths 20-70 m, and finally by coarse bioclastic grainstones and oncolites which are interpreted as talus of the coral reef constructed on tops of former sponge bioherms by branched and hemispherical coral colonies in very dynamic and extremely shallow water conditions.
    Źródło:
    Volumina Jurassica; 2004, 2, 1; 17-28
    1896-7876
    1731-3708
    Pojawia się w:
    Volumina Jurassica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Jurajskie korale w Polsce
    Jurassic corals in Poland
    Autorzy:
    Roniewicz, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/2077293.pdf
    Data publikacji:
    2004
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    jura
    facja korali
    środowisko
    skleraktinie
    korale
    Jurassic
    scleractinian corals
    environment
    coral facies
    Opis:
    In the epicontinental Jurassic of Poland, scleractinian corals appeared in the Bathonian, but only in the Middle Oxfordian-Lower Kimmeridgian became a significant element of the shallow-water fauna. Over the whole area, Upper Jurassic coral facies are situated above the Oxfordian sponge megafacies. Middle Oxfordian Jurassic corals are the best known from the NE margin of the Holy Cross Mts and represented chiefly by lamellate colonies. The Upper Oxfordian and Kimmeridgian coral facies extends from the Pomerania, through central Poland to the fore-Carpathian region. Taxonomical and morphotypical coral diversifications of the Upper Oxfordian and Kimmeridian were higher than that of the Middle Oxfordian. In the Tethyan region, corals are known from the exotic pebbles of the Stramberk-type Tithonian limestones in the Carpathian Flysh and Pieniny Klippen Belt. The arguments against the interpretation of epicontinental coral accumulations as reefs, are as follows: abundance of lamellate corals and epithecate phaceloid taxa (the latter incapable to repair skeletal damages), high taxonomical diversification and frequency of corals with menianes representing presumable adaptations to filtering mode of nutrition, comparable rate of growth of coral constructions and of accumulation of surrounding sediment, association of corals characterized above with soft bottom and turbid water.
    Źródło:
    Volumina Jurassica; 2004, 2, 1; 83-98
    1896-7876
    1731-3708
    Pojawia się w:
    Volumina Jurassica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Facies and diagenetic evolution of the Bathonian-Oxfordian mixed siliciclastic-carbonate sediments of the Habo Dome, Kachchh Basin, India
    Autorzy:
    Ahmad, A. H. M.
    Irshad, R.
    Bhat, G. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2077322.pdf
    Data publikacji:
    2015
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    facies
    diagenetic evolution
    Habo Dome
    Kachchh Basin
    India
    facja
    diageneza
    ewolucja diagenetyczna
    Kachchh
    Indie
    Opis:
    This paper examines the depositional environment and diagenetic aspects of the exposed Patcham and Chari formation within the Habo Dome. The Patcham Formation is represented by the Black Limestone Member. The Chari Formation is represented by two distinct sedimentary successions: (i) shale and carbonates, and (ii) coarse clastics. The paper describes eleven lithofacies from these successions. The depositional framework constituents of these facies have been greatly modified by diagenetic evolution through time. Two main depositional environments, i.e. foreshore intertidal and shoreface (subtidal), have dominated during their deposition. The diagenetic signatures observed within these sediments suggest early or syndepositional changes in marine phreatic and burial environments. Two phases of early mechanical compaction have largely governed porosity evolution within the limestone facies. Micritization of the allochems was caused by endolithic algae prevalent within the restricted lagoon environments with stagnant marine phreatic zone conditions. Random dissolution of microcrystalline grains has created vugs with patchy distribution reflecting neomorphism within the meteoric vadose zone. The types of cements within the sandstone facies include silica, calcite, and its replacement by Fe-calcite cement. The sandstones were deposited in a relatively low energy environment below storm wave base. The depositional conditions have controlled the early diagenesis of the sandstones which in turn have influenced their burial diagenesis.
    Źródło:
    Volumina Jurassica; 2015, 13, 1; 83--104
    1896-7876
    1731-3708
    Pojawia się w:
    Volumina Jurassica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sołtyków - unikalny zapis paleoekologiczny wczesnojurajskich utworów kontynentalnych
    Sołtyków, Poland – an unique palaeoecological record ot the Early Jurassic continental deposits
    Autorzy:
    Pieńkowski, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/2077290.pdf
    Data publikacji:
    2004
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    wczesna jura
    Polska
    utwory kontynentalne
    geopark
    ochrona przyrody
    Early Jurassic
    Polska
    continental facies
    vertebrate tracks
    nature conservation
    Opis:
    The Sołtyków exposure is an old, long time abandoned clay pit. This exposure became known as a classical outcrop of alluvial-lacustrine deposits. Floral remains point to the earliest Jurassic (Lias 1-2) age, and the sequence stratigraphic correlation allows to narrow its age range to the Early Hettangian (Planorbis biochronozone). Sołtyków exposure fits the avulsion-controlled (crevassing- anastomosing) fluvial sedimentation model, however, some features such as laterally-accreted bedding point also to presence of high-sinuosity/meandering streams. Relatively thick and individualised package of lacustrine deposits occurring in the Sołtyków outcrop points to some permanency of the lake/swamp area during deposition of the sediments visible in the outcrop. Palaeosols are both of Podzol and Histosol type. The plant fossils in the Sołtyków exposure are very abundant and well preserved. The list of plants includes Neocalamites, the matoniacean, osmundacean and other indeterminate ferns, as well as pteridosperms, benettitaleans and conifers. Non-marine trace fossils comprise Coprinisphaera, Scoyeniaand aquatic Mermia ichnofacies. Other fossils that occur in Sołtyko?w are represented by Unionidae freshwater bivalve assemblage, insect remains, fresh-water ostracodes and scales of palaeoniscid fish. The Sołtyków exposure is well known Early Jurassic tracksite with numerous dinosaur footprints, mainly left by theropods and sauropods, and early mammalian footprints. The dinosaur nesting ground was also described. Recently, the Sołtyków exposure has been declared a natural reserve. Nature conservation problems are discussed. Due to many unique finds in Sołtyków (the oldest known evidence of gregarious ethology of dinosaurs, the biggest known Early Jurassic theropod footprints, rich and well-preserved invertebrate ichnoforms and plant remains, this exposure should be enlisted on the UNESCO World Heritage List (in geological cathegory). Moreover, the idea of “Kamienna Valley” geopark, comprising Sołtyków and other valuable outcrops in the region, is introduced.
    Źródło:
    Volumina Jurassica; 2004, 2, 1; 1-16
    1896-7876
    1731-3708
    Pojawia się w:
    Volumina Jurassica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The stratigraphy and palaeogeographic position of the Jurassic successions of the Priborzhavske-Perechin Zone in the Pieniny Klippen Belt of the Transcarpathian Ukraine
    Autorzy:
    Wierzbowski, A.
    Krobicki, M.
    Matyja, B. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2061012.pdf
    Data publikacji:
    2012
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    stratigraphy
    Jurassic
    ammonites
    facies
    rift phases
    palaeogeography
    Pieniny Klippen Belt
    Transcarpathian Ukraine
    facje
    jura
    stratygrafia
    amonity
    paleogeografia
    Pieniński Pas Skałkowy
    Ukraina Zakarpacka
    Opis:
    The Jurassic deposits which crop out in the quarries at Priborzhavske, Perechin and Novoselitsa in the Transcarpathian Ukraine comprise fairly similar successions, allowing their interpretation as corresponding to a single palaeogeographic zone in the Pieniny Klippen Basin. To the same zone belong also deposits from Beňatina quarry in eastern Slovakia. The following main stratigraphic units may be recognized: terrigenous and fleckenkalk-fleckenmergel deposits (Sinemurian-Pliensbachian), highly diversified and condensed deposits (uppermost Pliensbachian-Aalenian), crinoidal limestones (Bajocian, with a stratigraphical gap covering a lower part of the Lower Bajocian), nodular limestones of ammonitico-rosso type (uppermost Bajocian to Oxfordian with a possible gap covering the Callovian and Lower Oxfordian), well bedded micritic limestones (Kimmeridgian to Upper Tithonian), and bedded limestones with cherts of the maiolica type (from the uppermost Tithonian). Two rifting phases, well developed in the successions, took place: (1) Devín phase during latest Pliensbachian-Toarcian-and at least earliest Aalenian, and (2) Krasín phase during the Bajocian. The onset of pelagic deposits overlying the rift strata took place during the latest Bajocian, and corresponds well with the general subsidence and development of a more uniform facies pattern during the post-rifting time as everywhere in the Pieniny Klippen Basin. Selected ammonite taxa of the Lower and lower part of the Middle Jurassic are illustrated and discussed.
    Źródło:
    Volumina Jurassica; 2012, 10, 1; 25--60
    1896-7876
    1731-3708
    Pojawia się w:
    Volumina Jurassica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Lower Kimmeridgian of the Wieluń Upland and adjoining regions in central Poland: lithostratigraphy, ammonite stratigraphy (upper Planula/Platynota to Divisum zones), palaeogeography and climate-controlled cycles
    Autorzy:
    Wierzbowski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2060986.pdf
    Data publikacji:
    2017
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    ammonites
    biostratigraphy
    facies
    Lower Kimmeridgian
    Central Poland
    Wieluń Upland
    synsedimentary tectonics
    palaeogeography
    primary sedimentary cyclicity
    amonity
    biostratygrafia
    facja
    Niższy Kimmeridgian
    centralna Polska
    Wyżyna Wieluńska
    tektonika synsedymentacyjna
    paleeogegeografia
    Opis:
    The Early Kimmeridgian of the Wieluń Upland and adjoining regions, after the decline of sedimentation of the deep-neritic sponge megafacies (Częstochowa Sponge Limestone Fm.) and associated limestones and marls with poor benthic fauna (Pilica Fm.) during the Planula Chron, showed the subsequent development of moderately shallow-water biostromal chalky limestones with siliceous sponges and corals, replaced laterally by micritic limestones and marls (Prusicko Fm.) during the Platynota Chron and the earliest Hypse¬locyclum Chron. Towards the north and south shallow-marine carbonate platforms occurred (represented by deposits of the “oolitic” fm.), whereas towards the north-west and west deeper marine facies, represented initially by limestones with siliceous sponges (Częstochowa Sponge Limestone Fm.), and later during the Hypselocyclum Chron by bedded limestones and marls with ammonites (Burzenin Fm.) were deposited. This palaeogeographic pattern was controlled by the synsedimentary tectonics. The detailed biostratigraphical classification of the deposits studied from the Platynota to the Divisum zones, and their lithological character, enable the recognition of the primary sedimentary cyclicity by comparison with the well dated short eccentricity cycles in the coeval succession of south-eastern France. The two appendixes enclosed give the characteristics of: (1) the characteristics of the ammonite faunas especially of the families Ataxiocerati¬dae and Aulacostephanidae (where two new species are established – Balticeras samsonowiczi sp. nov., and Rasenioides glazeki sp. nov.); (2) the newly established lithostratigraphical units: the Prusicko Fm., and the Burzenin Fm., and the smaller rank units (members, beds) recognized therein.
    Źródło:
    Volumina Jurassica; 2017, 15, 1; 41--120
    1896-7876
    1731-3708
    Pojawia się w:
    Volumina Jurassica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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