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    Wyświetlanie 1-9 z 9
    Tytuł:
    Lithofacies and depositional environments of the Paleogene/Neogene sediments in the Hoanh Bo Basin (Quang Ninh province, NE Vietnam)
    Autorzy:
    Hoang, V. T.
    Wysocka, A.
    Phan, D. P.
    Nguyen, Q. C.
    Ziółkowski, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/184794.pdf
    Data publikacji:
    2015
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    terrestrial environments
    lithofacies
    Paleogene
    Neogene
    Vietnam
    Opis:
    The Hoanh Bo Basin is a multiple period formed basin which is associated with the tectonic mechanism due to the activity of the Chi Linh-Hon Gai and Trung Luong Faults during the late Paleogene – early Neogene time. The basin is filled with continental sediments, comprising mainly polymictic conglomerates, sandstones, siltstones, claystones and shales. Coarser-grained polymictic deposits predominate along the northern and western margins of the basin, while different types of siltstones, claystones, even sandstones occur in its center, as well as along its southern and eastern parts toward the Ha Long Bay. The source rocks for sedimentary materials are mainly originated from rocks of the Hon Gai and Ha Coi Formations. Based on the dominant grain-size class, texture, stratification, degree of clast rounding and sorting, 17 lithofacies were determined in the Hoanh Bo Basin infill. The basin is filled by gravelly, sandy and fine-grained lithofacies just covers a modest area but it represents a full of succession of 4 depositional systems including alluvial fan, fluvial, deltaic and lacustrine environments. Alluvial fan and fluvial environments are characterized by an assemblage of lithofacies such as sand- and mud-supported disorganized breccias (Gb), clast- to sand-supported conglomerates (Gmm), clast-supported inverse-graded conglomerates (Gig), planar-cross-bedded conglomerates (Gp), trough cross-bedded conglomerates (Gt), horizontally stratified conglomerates (Gh), planar cross-bedded sandstones (Sp), trough cross-bedded sandstones (St), ripple cross-laminated sandstones (Sr), horizontally bedded sandstones (Sh), massive sandstones (Sm), massive mudstones, siltstones (Fsm), laminated siltstones and mudstones (Fl), massive claystones (Fm) and coaly lithofacies (C); the deltaic assemblage is dominated by planar-cross-bedded conglomerates (Gp), horizontally stratified conglomerates (Gh), planar cross-bedded sandstones (Sp), horizontally bedded sandstones (Sh), low-angle cross-bedded sandstones (Sl); while the lacustrine assemblage consists of ripple cross-laminated sandstones (Sr), horizontally bedded sandstones (Sh), normally graded sandstones (Sng), massive mudstones, siltstones (Fsm), laminated siltstones and mudstones (Fl), massive claystones (Fm) and coaly lithofacies (C).
    Źródło:
    Geology, Geophysics and Environment; 2015, 41, 4; 353-369
    2299-8004
    2353-0790
    Pojawia się w:
    Geology, Geophysics and Environment
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Lithofacies and terrestrial sedimentary environments in AMS measurements: case study from Neogene of Oravica River section, Čimhová, Slovakia.
    Autorzy:
    Łoziński, M.
    Ziółkowski, P.
    Wysocka, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2059848.pdf
    Data publikacji:
    2016
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    anisotropy
    magnetic susceptibility
    facies analysis
    terrestrial environments
    Neogene
    Orava-Nowy Targ Basin
    Opis:
    The anisotropy of magnetic susceptibility (AMS) of sedimentary rocks has been used for interpreting wide range of processes: early rock deformations, palaeotransport directions, as well as the evolution of mineral content. Various sedimentary factors which may determine magnetic susceptibility within lacustrine, river, floodplain and swamp deposits have been examined in the Oravica section of the Orava-Nowy Targ Basin. Multiple components of mineral content: illite, chlorite, smectite, kaolinite, quartz and unidentified high susceptibility phase make an AMS interpretation of this content ambiguous. However, this method may be useful for tracing early diagenetic geochemical/microbial processes where iron element is involved. Some sedimentary processes may be recognized from AMS when an assemblage of parameters is studied together: bulk susceptibility, the degree and the shape of anisotropy, principal directions, and the distribution of all these parameters within a set of specimens. Debris-flow processes, as well as lacustrine and floodplain sedimentation are especially well-defined in AMS results. Palaeotransport directions are ambiguous because studied rocks have undergone weak deformation what overprints this sedimentary feature. Most specimens represent an oblate shape of anisotropy and show a good correlation of minimum susceptibility axis and normal to bedding plane.
    Źródło:
    Geological Quarterly; 2016, 60, 2; 259--272
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Eocene sedimentary facies in volcanogenic succession on King George Island, South Shetland Islands : a record of pre-ice sheet terrestrial environments in West Antarctica
    Autorzy:
    Mozer, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2060603.pdf
    Data publikacji:
    2013
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Antarctica
    King George Island
    Eocene
    preglacial environments
    plant fossils
    Opis:
    About 34 Ma ago there was a radical change of climate that led to the formation of Antarctic ice sheet. King George Island, located in the South Shetland Islands volcanic arc (northern Antarctic Peninsula region), is one of a few places in West Antarctica which shows a geological record of sedimentary environments preceding development of the ice sheet. The Eocene sedimentary facies occur in the dominantly volcanogenic succession of King George Island. They have been recognized in the Arctowski Cove and Point Thomas formations (Ezcurra Inlet Group) and in the Mount Wawel Formation (Point Hennequin Group) in Admiralty Bay, and in the Mazurek Point Formation (Chopin Ridge Group) and Lions Cove Formation (Polonia Glacier group) in King George Bay. They record a cooling trend in terrestrial environments that began at termination of the Early/Middle Eocene Climatic Optimum, and was followed by a significant deterioration of climate during Late Eocene and earliest Oligocene, directly preceding glacial conditions in the northern Antarctic Peninsula region. The ongoing research confirms the existence of three preglacial climatic stages (PGS-1 – PGS-3) during Eocene – earliest Oligocene, from humid, warm to moderate climate (PGS-1), through cool and dry climate (PGS-2), up to cold and humid conditions (PGS-3). Studies were carried out on usually fine-grained volcanoclastic sediments, containing Podocarpaceae–Araucaria–Nothofagus plant fossils assembly. Beds of reworked pyroclastic material alternate with lava flows or volcanic agglomerates, as well as ex situ blocks of Eocene volcanogenic sediments on a moraine. Calculated geochemical indices of weathering (CIA, PIA and CIW) confirm moderate to high chemical weathering under warm and humid climate conditions at the beginning and deterioration of conditions in the end of Eocene.
    Źródło:
    Geological Quarterly; 2013, 57, 3; 385--394
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Stable carbon and nitrogen isotopes and elemental composition and origin of organic matter from the Neogene Euphrates, Injana and Dibdibba formations in Iraq : discrimination between marine and terrestrial environments
    Autorzy:
    Awadh, S. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2060490.pdf
    Data publikacji:
    2014
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    stable carbon isotopes
    stable nitrogen isotopes
    organic matter
    marine environment
    terrestrial environment
    palaeoenvironment
    Iraq
    Opis:
    Three Neogene sedimentary formations reflecting different depositional environments have been investigated for the purpose of diagnosing the isotopic source of the sedimentary organic matter and their palaeoenvironmental significance in discriminating between marine and terrestrial environments. One of these formations is composed of carbonate and marl of a shallow-marine environment (Euphrates Formation), and the other formations are composed of a clastic terrestrial (fluviatile) deposits with some differences in the depositional conditions (Injana and Dibdibba formations). The isotopic δ13C%, δ15N% values, organic carbon (OC) and total nitrogen contents, and atomic C/N ratios are used as evidence of depositional environment. Average δ13C values (in ‰) for the Dibdiba, Injana and Euphrates formations are –25.4, –25.7 and –24.5, respectively; average δ15N values (in ‰) are 4.44, 5.24 and 7.24 and average OC (in wt.%) is 0.13, 0.3 and 1.1, respectively. A significant variation in the stable carbon and nitrogen isotope compositions between fluvial and marine deposits was recorded. The δC, δ15N and C/N values indicate that the organic matter in the Euphrates Formation is of marine origin, whereas it is of terrestrial origin (fluviatile) in the Injana and Dibdibba formations. The C/Natomic values are mostly high in the Injana (37) and Dibddiba formations (51), suggesting greater input and/or preservation of terrestrial organic matter derived from land plants; the shallow-marine environment (Euphrates Formation) was characterized by a low C/N ratio (9) due to the algal-derived organic matter with limited input of terrestrial organic matter.
    Źródło:
    Geological Quarterly; 2014, 58, 4; 729--736
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Traszki i salamandry - życie na granicy środowisk na przykładzie przedstawicieli rodziny salamandrowatych
    Newts and salamanders - the Salamandridae family as an example of living on the border of aquatic and terrestrial environments
    Autorzy:
    Różański, Józef
    Żuwała, Krystyna
    Powiązania:
    https://bibliotekanauki.pl/articles/1034167.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Przyrodników im. Kopernika
    Tematy:
    biodiversity
    origin
    phylogenetics
    Salamandridae
    threats
    bioróżnorodność
    filogeneza
    pochodzenie
    salamandrowate
    zagrożenia a
    Opis:
    Poniższa praca prezentuje syntezę najnowszych danych dotyczących pochodzenia, filogenezy, bioróżnorodności i przystosowań przedstawicieli rodziny salamandrowatych. Wywodząca się z Europy, grupa tych płazów od wieków interesowała badaczy i obserwatorów natury. Różnorodność adaptacji do życia na granicy środowisk wodnego i lądowego sprawiły, iż salamandrowate mają swoich reprezentantów na czterech kontynentach (Europa, Azja, Ameryka Północna i Afryka). W efekcie są drugą pod względem zasobności gatunkowej rodziną w rzędzie płazów ogoniastych. Wciąż też odkrywane są nowe gatunki, zwłaszcza na obszarach Azji. Warto zaznaczyć, że aż pięciu przedstawicieli omawianej rodziny żyje na terenie Polski. Pomimo rozwiniętych zdolności przystosowawczych, wiele gatunków salamandrowatych jest w różnym stopniu zagrożonych. Świadomość społeczna, w odniesieniu do wartości, jaką jest bioróżnorodność naszej planety, może pomóc w ocaleniu tych zwierząt przed wymarciem.
    This paper presents synthesis of the latest data concerning origin, phylogenetics, biodiversity and adaptations of representatives of the Salamandridae family. Originating from Europe, this group of amphibians has drawn attention of naturalists, researchers and nature observers. As a result of various forms of adaptations to live on the border of aquatic and terrestrial environments, salamanders have their representatives on four continents (Europe, Asia, North America and Africa). It is also the second most numerous family in Caudata order. It's worth mentioning that new species, especially in Asia, are being still uncovered. Five representatives of Salamandridae live on the territory of Poland. Despite well-developed adaptive abilities, many species of salamanders are threatened. Social awareness of our planet biodiversity's value might prevent those species from extinction.
    Źródło:
    Kosmos; 2017, 66, 2; 261-271
    0023-4249
    Pojawia się w:
    Kosmos
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Marine vs. terrestrial environments during Early Triassic deposition on the northeastern margin of the Central European Basin : a multidisciplinary study on the Middle Buntsandstein of the Bartoszyce IG 1 borehole, NE Poland
    Autorzy:
    Becker, Anna
    Fijałkowska-Mader, Anna
    Jasionowski, Marek
    Powiązania:
    https://bibliotekanauki.pl/articles/2060144.pdf
    Data publikacji:
    2020
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Lower Triassic
    northeastern Poland
    palynofacies
    clay mineralogy
    olite microfacies
    isotope geochemistry
    Opis:
    The Middle Buntsandstein Subgroup of the Lower Triassic of north-eastern Poland has been investigated in the context of possible marine ingressions into the Central European Basin. To better constrain these, palynofacies analysis and mineralogical analysis of mudstones were undertaken on samples taken from the Lidzbark and Malbork formations penetrated by the Bartoszyce IG 1 borehole, serving as stratotype section of both lithostratigraphic units. Microfacies and geochemical analyses, including C and O isotope analysis, were conducted additionally on oolitic limestones of the basal Lidzbark Formation (the lowermost Middle Buntsandstein), and the boron content was measured on all mudstone samples. Seven palynofacies types are distinguished: types 1 to 3 within the Malbork Formation and types 4 to 7 within the Lidzbark Formation. Types 1 and 2 originated on a floodplain, type 3 probably in a deltaic or barrier setting, and types 4 and 5 in a brackish lagoon or a more open basin, possibly of marine origin. Palynofacies type 6 reflects long transport and reworking, whereas palynofacies type 7 is interpreted as formed due to pedogenic processes. Clay minerals and quartz, accompanied by feldspars, calcite and dolomite are the main components of the mudstones investigated. The clay mineral association consists of illite or a mixture of illite and smectite, and chlorite. The Lidzbark Formation and the lowermost part of the Malbork Formation show less variability in mineralogical composition than the upper part of the Malbork Formation. Smectite admixtures were detected only in the upper part of the Malbork Formation (the uppermost Middle Buntsandstein). The boron content, achieved after aqua regia digestion, ranges from 70 to 121 mg/kg (96 mg/kg at average), oscillating generally around 90 mg/kg. A higher boron content, bound in silicate structure, is associated with the upper part of the Malbork Formation. All major mineralogical and geochemical changes coincide more or less with the transition from the supposed marine to the terrestrial environmental realm, interpreted from lithological and sedimentological observations within the lowermost part of the Malbork Formation. However, diagenetic alteration of the clay minerals, and of the boron content, could not be ruled out. The oolitic limestones, mainly grainstones, contain admixtures of quartz grains and rare bioclasts, the ooids nuclei being peloids or unrecognizable. The carbonates are almost exclusively composed of low-Mg calcite. A high content of Mg and the presence of small amounts of dolomite suggest that the ooids were primarily composed of high-Mg calcite and are comparable with similar Early Triassic deposits in Tethyan settings. The δ13C values range from -2 to +1%o VPDB, fitting well with the known ranges of Lower Triassic marine carbonates. An observed δ13C depletion towards the top of the oolite-bearing part of the section may reflect a local shallowing trend that led to overall salinity decrease. A possible connection with the one of the global oceanic geochemical episodes has to be tested further. The results obtained suggest a marine origin of the lower Middle Buntsandstein deposits studied and document a terrestrial origin for the upper Malbork Formation.
    Źródło:
    Geological Quarterly; 2020, 64, 4; 1023---1047
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Neogene terrestrial sedimentary environments of the Orava-Nowy Targ basin : case study of the Oravica section near Čimhová, Slovakia
    Autorzy:
    Łoziński, M.
    Wysocka, A.
    Ludwiniak, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/2060622.pdf
    Data publikacji:
    2015
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    sedimentology
    lithofacies
    Neogene
    Orava-Nowy Targ basin
    Carpathians
    Opis:
    The Orava-Nowy Targ Basin is an intramontane depression located at the border of the Inner and Outer Carpathians. It is filled mostly with fine-grained terrestrial and fresh-water deposits of Neogene and Quaternary age, which record the structural evolution and denudation processes of the surrounding regions: Orava, Podhale, and the Tatra Mts. The Orava-Nowy Targ Basin fill was studied in the Oravica River section, which reveals 90 m thick Neogene deposits and allows observation of their lateral diversity. Fifteen lithofacies and seven facies associations distinguished here document the depositional evolution of the basin fill, starting from hill-slope debris flow through silt turbidite-bearing lake, to flood-dominated fluvial plain, swamp and alluvial fan deposits, as well as a pyroclastic event. The palaeorelief was low during deposition and the Orava-Nowy Targ Basin could have spread significantly more to the south.
    Źródło:
    Geological Quarterly; 2015, 59, 1; 21--34
    1641-7291
    Pojawia się w:
    Geological Quarterly
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Rotifers as indicators of climate change in the Antarctic environments
    Autorzy:
    Pociecha, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/11956.pdf
    Data publikacji:
    2010
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    rotifer
    indicator
    climate change
    Antarctic environment
    biodiversity
    freshwater ecosystem
    terrestrial ecosystem
    Antarctic
    Opis:
    An important question stated in the presented paper is: Could rotifers be the indicators of climate change in the Antarctic environments? Rotifers are one of the most important components of the invertebrate fauna of the Antarctic freshwater and terrestrial ecosystems. However, investigations of their distribution, diversity and an ecological role in the environment have been widely neglected, mainly due to the methodological and taxonomical difficulties. During the investigations 176 species of rotifers were found, including the endemic and cosmopolitan species. Their existence is directly proportional to microvariations of humidity factor. Scientists still have poor knowledge about the occurrence of rotifer species in recently studied habitats e.g. cryoconite holes, nunataks or soil. Probably rotifers could be the indicators of climate change in the Antarctic freshwater and terrestrial ecosystems but more investigations and monitoring studies are needed.
    Źródło:
    Papers on Global Change; 2010, 17
    2300-8121
    1730-802X
    Pojawia się w:
    Papers on Global Change
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Biological and Ecological Traits of Terrestrial Arthropods (Arthropoda: Insecta) in North-West Morocco
    Autorzy:
    El Harche, Hanae
    Chavanon, Guy
    Dahmani, Jamila
    Bedoui, Imane
    Kaioua, Samiha
    Fadli, Mohamed
    Powiązania:
    https://bibliotekanauki.pl/articles/2025677.pdf
    Data publikacji:
    2021
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    trophic diet
    mobility
    hygrophilic
    Morocco
    fields
    natural environments
    bioecological traits
    Opis:
    In order to understand the relationship between the biological characteristics of insects and their environment, an entomological study was conducted at 5 stations (agricultural and natural) in the region of northwest Morocco (Sidi Kacem) between March 2019 and September 2020. Three sampling techniques were used (sweep nets, pitfall traps, and sight hunting). The inventory of insect species captured by these different methods in the various stations reveals the presence of 105 species distributed among 7 orders belonging to 35 families. According to the results, the presented adaptive parameters such as diet, flying ability, body size, and humidity sensitivity of the species showed that predators, macropterous, small size, and hygrophilic species are more frequent.
    Źródło:
    Journal of Ecological Engineering; 2022, 23, 1; 252-263
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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