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    Wyświetlanie 1-7 z 7
    Tytuł:
    New data on the trace fossil, Cruziana semiplicata (Furongian, Wiśniówka Sandstone Formation, Poland) : origin, ethology and producer
    Autorzy:
    Sadlok, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/191421.pdf
    Data publikacji:
    2014
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    Cruziana semiplicata
    Triops
    fossilized behaviour
    neoichnology
    Furongian
    Polska
    Opis:
    Cruziana semiplicata Salter is a well known ichnospecies, ascribed to trilobites. Despite that, there are still contradicting views on its origin (infaunal vs. epifaunal), the ethology represented (crawling vs. feeding) and the identity of its producer (a few trilobite genera were proposed). In this paper, new data are presented and com- bined to create a coherent interpretative model for Cruziana semiplicata. According to this new model, Cruziana semiplicata is a fossilized version of an epifaunal, pascichnial (feeding) trace produced by an organism, positioned above the seabed with only a few frontal appendages touching the depositional surface and processing the sedi- ment below. This model is based on observations of trace fossil morphology and neoichnological observations of the feeding behaviour of Triops australiensis. Also, a short geometrical comparison with the co-occurring Rusophycus polonicus is made to show that these trace fossils most likely had different trace makers.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2014, 84, 1; 35-50
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Compaction-related style of Rusophycus preservation from Furongian (Upper Cambrian) of Holy Cross Mountains (Poland)
    Autorzy:
    Sadlok, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/191759.pdf
    Data publikacji:
    2013
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    Rusophycus
    trace fossil
    preservation
    compaction
    Cambrian
    Furongian
    Polska
    Opis:
    In general, the trace fossil Rusophycus, preserved as a concave-upward structure on the top of a bed, is considered to be a fossilized marking, made by a trace maker. The structures described from the Cambrian (Furongian) of central Poland are genetically related to Rusophycus. However, despite their occurrence on the tops of beds, they are not fossilized traces, but compaction-related features, resulting from differential sandstone and mudstone compaction with possible mediation by organic-rich, heterolithic sediments. The preservation of these structures probably was influenced by biofilms or biomats.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2013, 83, 4; 317-327
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Rusophycus inexpectus isp. nov. from the Furongian (Upper Cambrian) of the Holy Cross Mountains (Poland
    Autorzy:
    Sadlok, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/191581.pdf
    Data publikacji:
    2014
    Wydawca:
    Polskie Towarzystwo Geologiczne
    Tematy:
    Rusophycus ramellensis
    Rusophycus inexpectus
    Furongian
    Cambrian
    ichnostratigraphy
    new ichnotaxa
    Opis:
    A new trace fossil Rusophycus inexpectus isp. nov. is described from the Furongian (Upper Cambrian) strata of the Holy Cross Mountains. This ichnospecies is probably non-trilobite in origin and is commonly preserved as an undertrace. This preservation style resembles that of Rusophycus ramellensis Legg, an index fossil of the Cambrian Series 3. Therefore, previous workers misinterpreted material from the Wiśniówka Sandstone Formation as Rusophycus ramellensis Legg (recorded by them as Cruziana barbata) and put the Cambrian Series 3 and Furongian boundary within this unit. Rusophycus inexpectus isp. nov differs from Rusophycus ramellensis Legg: 1) in having a smooth trapezoidal area behind the lobes; 2) in the presence of a direct contact between the endopodal lobes and cephalic margin imprints and 3) in the restriction of the occurrence of the endopodal lobes and scratches to the cephalic region of the trace fossil. Care must be taken, when dealing with the undertrace preservation style of Rusophycus ramellensis Legg in other assemblages, as it may represent Rusophycus inexpectus isp. nov.
    Źródło:
    Annales Societatis Geologorum Poloniae; 2014, 84, 2; 143-151
    0208-9068
    Pojawia się w:
    Annales Societatis Geologorum Poloniae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Wstępne dane o tropach stawonogów z furongu (górnego kambru) Wiśniówki Wielkiej (Góry Świętokrzyskie) i ich tafonomii
    Arthropod tracks from the Furongian (Upper Cambrian) of the Wiśniówka Wielka (Holy Cross Mountains) and their taphonomy: a preliminary report
    Autorzy:
    Sadlok, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/2074827.pdf
    Data publikacji:
    2011
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Upper Cambrian
    Furongian
    Holy Cross Mountains
    trace fossils
    trilobites
    taphonomy
    Opis:
    Previous works on arthropod trace fossils from the Furongian (Upper Cambrian) section exposed at theWioeniówkaWielka quarry (Holy Cross Mountains, Poland) focused on trilobite-made structures referred to as Rusophycus polonicus and Cruziana semiplicata. Arthropod trackways did not receive much attention. The present paper contains preliminary data on new records of arthropod trackways from the Furongian of the Wioeniówka Wielka section and on their taphonomy. The material studied comprises undetermined arthropod tracks and specimens belonging to three ichnogenera: ?Asaphoidichnus, Diplichnites and Petalichnus.
    Źródło:
    Przegląd Geologiczny; 2011, 59, 1; 82-90
    0033-2151
    Pojawia się w:
    Przegląd Geologiczny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Late Cambrian acritarch Lusatia: Taxonomy, palaeogeography, and biostratigraphic implications
    Autorzy:
    Albani, R.
    Bagnoli, G.
    Ribecai, C.
    Raevskaya, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/21158.pdf
    Data publikacji:
    2007
    Wydawca:
    Polska Akademia Nauk. Instytut Paleobiologii PAN
    Tematy:
    Acritarcha
    Cambrian
    Furongian
    Late Cambrian
    Lusatia
    acritarch
    biostratigraphy
    marine phytoplankton
    paleogeography
    paleontology
    taxonomy
    phytoplankton
    systematics
    distribution
    Opis:
    Intraspecific variability of the herein emended diacrodian acritarch Lusatia dendroidea is described based on late Cambrian (Furongian) well preserved material from Spain, the High Arctic of Russia, and the East−European Platform. L. dendroidea, displays bipolar asymmetric morphology and, as originally defined, consists of three long major processes originating from the “corners” of its vesicle. Specimens with one, two and four major processes are considered to represent morphological variations of the most common three process form. Based on its narrow stratigraphic range, widespread palaeogeographic distribution, and distinctive morphology, L. dendroidea is an excellent guide fossil for the Furongian.
    Źródło:
    Acta Palaeontologica Polonica; 2007, 52, 4
    0567-7920
    Pojawia się w:
    Acta Palaeontologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Slide origin of breccia lenses in the Cambrian of the North China Platform: new insight into mass transport in an epeiric sea
    Autorzy:
    Van, Loon A. J. (Tom)
    Han, Zuozhen
    Han, Yu
    Powiązania:
    https://bibliotekanauki.pl/articles/94404.pdf
    Data publikacji:
    2012
    Wydawca:
    Uniwersytet im. Adama Mickiewicza w Poznaniu
    Tematy:
    breccia lenses
    sliding
    epeiric sea
    Chaomidian Formation
    Furongian
    North China Platform
    poślizg
    morze epikontynentalne
    formacja Chaomidian
    Furong
    platforma północnokoreańska
    Opis:
    An oolite in the Furongian (Late Cambrian) Chaomidian Formation in Shandong Province, China, which was deposited on the North China Platform in an epeiric sea, contains several limestone breccia lenses of various dimensions (centimetres to decimetres thick and decimetres to more than 10 metres in length) in an E-trending section. The oolite, which is approximately 40 cm thick, was originally thicker, as indicated by a planar truncation surface that formed by wave abrasion. The breccia lenses in this oolite are generally mound-shaped with a flat base and a convex top. The western margin of the lenses is commonly rounded whereas the eastern margin commonly has a tail (consisting of a rapidly eastwards thinning breccia horizon that gradually ends in a horizon of isolated clasts). Some of the breccia lenses are underlain by a shear zone. The formation of the breccia lenses cannot be easily explained by normal depositional or deformational processes. It is concluded that the lenses represent fragments of a partly consolidated layer, consisting of both rounded and angular platy clasts, which slid down over a very gently inclined sedimentary surface which acted - possibly together with a water film - as a lubricant layer. During transport, the layer broke up into several discrete bodies that formed small ‘highs’ at the sedimentary surface of the shallow epeiric sea. Subsequently, waves partially eroded the lenses, mostly at their margins, producing their mound-shaped form. Sliding of blocks is known from a wide variety of environments in the sedimentary record; however, this is the first description of the sliding of blocks in an epeiric sea. This indicates that such a low-relief submarine carbonate setting is, like its siliciclastic counterparts, susceptible to this process.
    Źródło:
    Geologos; 2012, 18, 4; 223-235
    1426-8981
    2080-6574
    Pojawia się w:
    Geologos
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Exotic trilobites from the uppermost Cambrian Series 3 and lower Furongian of Sweden
    Autorzy:
    Żylińska, A.
    Weidner, T.
    Ahlgren, J.
    Ahlberg, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/139294.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Trilobita
    Cambrian Series 3
    Furongian
    Alum Shale
    glacial erratic boulders
    Sweden
    Denmark
    Scandinavia
    Exotic trilobites
    Trylobity
    trzeci oddział kambru
    Furong
    łupek ałunowy
    polodowcowe głazy narzutowe
    Szwecja
    Dania
    Skandynawia
    egzotyczne trylobity
    Opis:
    Seventeen taxa of exotic trilobites representing eight families are described from the olenid- and agnostoid-dominated strata of the uppermost Cambrian Series 3 and lower Furongian alum shale facies of Sweden and from glacial erratic boulders of Denmark. Only five taxa are assigned to species level, i.e., Maladioidella abdita (Salter, 1866), Olentella rara (Westergård, 1922), Pedinocephalus peregrinus (Henningsmoen, 1957), Ptychoparia pusilla (Westergård, 1922), and Westergaardella olenorum (Westergård, 1922), whereas the others are left under open nomenclature or remain unrecognized. Most are described for the first time from the Cambrian of Scandinavia. Their affinities point to a strong connection with East Gondwana, Laurentia, Kazakhstania and Siberia. Exotic trilobites appear in the succession directly after periods of very low oxygen concentration in the Alum Shale Sea; their occurrences correspond to the ranges of agnostoid arthropods in the succession and seem to be linked to global transgressive events causing an influx of cool and/or oxygen-depleted waters onto the shelf of the Baltica palaeocontinent.
    Źródło:
    Acta Geologica Polonica; 2015, 65, 1; 21-67
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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