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Tytuł:
Calpionellid biostratigraphy across the Jurassic/Cretaceous boundary in San José de Iturbide, Nuevo León, northeastern Mexico
Autorzy:
López-Martínez, R.
Barragán, R.
Reháková, D.
Powiązania:
https://bibliotekanauki.pl/articles/2059641.pdf
Data publikacji:
2015
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
calpionellids
Jurassic/Cretaceous boundary
Mexico
biostratigraphy
Opis:
Detailed bed-by-bed sampling on an outcrop of the La Casita and Taraises formations in northeastern Mexico (San José de Iturbide, Nuevo León State) allows the delimitation of the Jurassic/Cretaceous boundary. The Late Tithonian was determined by the presence of the Crassicollaria Zone (Colomi Subzone). Underlying subzones (Remanei and Brevis) were not identified due to the scarcity and poor preservation of calpionellids. The Jurassic/Cretaceous boundary was defined by the acme of the small and spherical form of the species Calpionella alpina Lorenz in sample IT-120. The Berriasian was divided into two zones and five subzones: the Calpionella Zone (Alpina, Ferasini and Elliptica subzones) and the Calpionellopsis Zone (Simplex and Oblonga subzones). The facies studied indicate that deposition during the Tithonian occurred in a toe of slope environment with occasional deep shelf incursions. Near the Jurassic/Cretaceous boundary, a sea level drop is recorded and the facies indicate a slope environment with the occurrence of a breccia level. A general deepening of the environments recorded within the frame of the Elliptica Subzone where the deposits pass into basinal facies
Źródło:
Geological Quarterly; 2015, 59, 3; 581--592
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Mesozoic gastropods from Siberia and Timan (Russia). Part 2: Neogastropoda and Heterobranchia
Autorzy:
Kaim, Andrzej
Beisel, Alexander L.
Powiązania:
https://bibliotekanauki.pl/articles/2052039.pdf
Data publikacji:
2005
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Siberia
Timan
Jurassic–Cretaceous
paleontology (gastropods)
taxonomy
Źródło:
Polish Polar Research; 2005, 26, 1; 41-64
0138-0338
2081-8262
Pojawia się w:
Polish Polar Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A new family of giant Jurassic–Cretaceous littorinoid gastropods from the northern Tethys shelf
Autorzy:
Harzhauser, M.
Schneider, S.
Powiązania:
https://bibliotekanauki.pl/articles/945827.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
mollusca
gastropoda
leviathania
carbonate platform
body size
jurassic–cretaceous
tethys
tithonian
ernstbrunn limestone
austria
Opis:
The giant, up to 40 cm high littorinoid gastropods from the Middle Tithonian to Berriasian carbonates of the Alpine-Carpathian northern Tethys margin are assigned to the genus Leviathania. The genus is distributed from Spain to the Caucasus. Some species formed dense populations in the wide-spread, highly productive lagoonal environments situated on the carbonate platforms of Ernstbrunn (Austria), Mikulov, Štramberk (both Czech Republic), and Nyzhniv (Ukraine). The conspicuous morphology, comprising very large shells with strongly angulated whorls and especially the phaneromphalous umbilicus exclude the traditional attributions of this genus to the families Purpurinidae and Purpuroideidae. Therefore, we establish the new family Leviathaniidae for the type genus Leviathania. The family comprises the largest pre-Cenozoic gastropods, represented by a yet unnamed gigantic Leviathania species from the latest Tithonian or early Berriasian of Ukraine. The gastropods are tentatively assumed to have fed omnivorous, i.e., on a mixed detrital-algal diet, based on comparable population densities as the large modern queen conch Lobatusgigas from the Caribbean Sea.
Źródło:
Acta Palaeontologica Polonica; 2014, 59, 2; 367-378
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Late Jurassic-earliest Cretaceous evolution of the epicontinental sedimentary basin of southeastern Poland and Western Ukraine
Autorzy:
Gutowski, J.
Popadyuk, I. V.
Olszewska, B.
Powiązania:
https://bibliotekanauki.pl/articles/2059544.pdf
Data publikacji:
2005
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Late Jurassic-earliest Cretaceous
SW margin of the East European Platform
stratigraphic correlation
depositional systems
sedimentary sequences
synsedimentary tectonics
Opis:
The following Late Jurassic depositional systems have been recognized in the WUkrainian and SE Polish margin of the East European Platform: shelf slope/basin, open shelf, carbonate ramp, siliciclastic shelf, fluvial/playa, deltaic/swamp, restricted marine/evaporate lagoon. Three depositional megasequences have been identified. Their upper boundaries have been dated by means of targeted stratigraphic studies, compilation of existing data and reinterpretation of stratigraphic correlation concepts respectively as: lower Kimmeridgian divisum/hypselocyclum zones boundary, uppermost upper Kimmeridgian and lower Berriasian. Analysis of thickness and depositional system architecture within themegasequences in six regional cross-sections indicates that depocentre was located in the SW margin of the Mid-Polish Trough during Oxfordian and early Kimmeridgian times and propagated in Tithonian time to the Lviv region. This can be explained by changes in the palaeostress field. Approximately N–S oriented extension during Oxfordian and earliest Kimmeridgian times was replaced by approximately NE–SW oriented extension in Tithonian time. The thickness pattern of the megasequences as well as proximity trends of the system tracts within the sequences clearly coincide with the depocentre propagation.
Źródło:
Geological Quarterly; 2005, 49, 1; 31--44
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Jurassic and Cretaceous evolution of Tethys: Palaeoceanographic events
Autorzy:
Yilmaz, İsmail Ömer
Powiązania:
https://bibliotekanauki.pl/articles/24202104.pdf
Data publikacji:
2023
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
Tethys
Cretaceous
Jurassic
Opis:
Jurassic and Cretaceous evolution of Tethys Ocean is characterized by extension of oceans basins, rifting, development of carbonate platforms and sea level fluctuations. Ocean basins and platform margins were sides of records of collaboration of oceanic, sea level and climate changes in different scales. Deposition of organic sediment increased on the margins of the ocean basins at certain time intervals due to changes in oceanic circulation and chemistry, productivity, climate and sea level. Oceanic Anoxic Events (OAE) stated to took place at aperiodic time intervals and generally associated with organic matter deposits and anoxic water columns. Records of oceanic anoxic event can also be associated by potential source rocks in Jurassic and Cretaceous along Tethys Ocean basins and can be tracked by stable isotope shifts, turnover of fossil groups, presence of black shales/organic rich mudstones, change in redox sensitive elements. Volcanic contribution in oceans is also considered as one of the collaborators of OAE generations. OAE records in Jurassic is seen in Toarcian interval and stated as Toarcian OAE. In Cretaceous, OAE records can be stated as Weissert, Faraoni, Selli (OAE1a), Noir, Fallot, Jacop, Kilian, Paquier (OAE1b), Leenhardt, Amadeus (OAE1c), Breistroffer (OAE1d), Bonarelli (OAE2), and OAE3. Generally, Cretaceous OAE are globally correlated or at least hemispherical. Some of them can be weakly correlated due to different duration and magnitude. Stratigraphic positions of OAE can also be used better marker levels in sequence stratigraphic interpretations. Therefore, positions of OAE are very important in terms of higher resolution for platform to basin correlations and even basin to basin. Cretaceous Oceanic Anoxic Events in eastern Tethys Ocean in Pontides and Taurides can be seen in Cretaceous successions (Mid-Barremian, Aptian, Albian, Cenomanian-Turonian) of Central Pontides (NW Turkey) and Central Taurides (S Turkey) (Yilmaz et al., 2004, 2010, 2012) as presence of black shales. The Mid-Barremian black shales (MBE) have been recorded within turbidite succession in deep marine setting in central Sakarya zone of Pontides following the drowning of the platform (Yilmaz et al., 2012). 2‰ shifts in carbon isotope curve is recorded in parallel with European basins, but with low TOC value. The Aptian black shales (OAE1a) are recorded in pelagic carbonate slope environments in central and north of Sakarya zone of Pontides and represented by a negative carbon isotope shift with 2‰, and TOC around 2% (Yilmaz et al., 2004; Hu et al., 2012). In Sakarya zone of Pontides, OAE2 is recorded in pelagic slope carbonates with carbon isotope curve more than 1‰ positive shift and >2% TOC. Another OAE2 was recorded in Antalya Nappes of Taurides without carbon isotope curve but TOC > 20% (Yurtsever et al., 2003, Bozcu et al., 2011). OAE1a equivalent in Tauride Carbonate platform can be interpreted as presence of dark colored thick stromatolite bearing platform carbonates transgressivley overlying the karstic sequence boundary. The OAE1a and OAE2 levels recorded in Turkey can easily be correlated with European examples and mainly controlled by sea level and tectonics in largescale and climate and oceanographic changes in small-scale. The most extensive distribution of the OAE records in Turkey belong to OAE1a and OAE2, and display potential for source rocks for hydrocarbon exploration.
Źródło:
Geotourism / Geoturystyka; 2023, 1-2 (72-73); 81--81
1731-0830
Pojawia się w:
Geotourism / Geoturystyka
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A new short-bodied salamander from the Upper Jurassic-Lower Cretaceous of China
Autorzy:
Wang, Y
Evans, S.E.
Powiązania:
https://bibliotekanauki.pl/articles/20232.pdf
Data publikacji:
2006
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
Lower Cretaceous
Cretaceous
China
Upper Jurassic
Pangerpeton sinensis
deposit
Jurassic
salamander
paleontology
Opis:
Abundant well−preserved salamander fossils have recently been recovered from localities across northeastern China. Pangerpeton sinensis gen. et sp. nov. is represented by a nearly complete skeletal impression of a postmetamorphosed salamander from the Late Jurassic/Early Cretaceous locality of Wubaiding, Liaoning Province. It is characterised by a short wide skull and only 14 presacral vertebrae. Associated soft tissue impressions suggest a warty skin and a broad body outline. Phylogenetic analysis indicates a basal position within Caudata, either just within or just outside crown−group Urodela.
Źródło:
Acta Palaeontologica Polonica; 2006, 51, 1
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wykorzystanie testów DST w rozpoznaniu i udostępnianiu złóż węglowodorów na przykładzie utworów jury górnej–kredy dolnej zapadliska przedkarpackiego
Application of DST tests to hydrocarbon deposits exploration and development on the example of Upper Jurassic–Lower Cretaceous strata of the Carpathian Foredeep
Autorzy:
Dubiel, S.
Uliasz-Misiak, B.
Powiązania:
https://bibliotekanauki.pl/articles/217119.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN
Tematy:
poszukiwania naftowe
jura górna
kreda dolna
zapadlisko przedkarpackie
test DST
udostępnianie złóż
petroleum exploration
Upper Jurassic Lower Cretaceous
Carpathian Foredeep
DST test
deposit development
Opis:
W publikacji przedstawiono problemy wykorzystania wyników testów DST w pracach związanych z rozpoznaniem i udostępnianiem złóż węglowodorów. Możliwość zastosowania wyników testów do projektowania technologii badań DST w rozpoznawanych złożach oraz podejmowanie decyzji technologicznych w trakcie udostępniania złóż przedstawiono na przykładzie utworów jury górnej–kredy dolnej zapadliska przedkarpackiego. W projektowaniu technologii testów DST zaproponowano wykorzystanie: wyników badań geofizycznych, prognozowania statystycznego warunków złożowych i parametrów technologicznych, wyników kontroli technicznej testu, stosowanych metod interpretacji oraz przetwarzania uzyskanych rezultatów. Omówiono możliwość zastosowania informacji uzyskanych z interpretacji testów DST w rozpoznawaniu złóż węglowodorów. Umożliwiają one określenie podstawowych parametrów złożowych, a także dokonanie szczegółowej diagnostyki złożowej możliwe dzięki oparciu na analizie i interpretacji rezultatów testów DST tradycyjną metodą Hornera oraz nowoczesną metodą log-log w zależności od jakości uzyskanych wykresów ciśnienia. Na przykładzie utworów jury górnej–kredy dolnej zapadliska przedkarpackiego przedstawiono sposób wykorzystania danych statystycznych uzyskanych z testów DST w projektowaniu kolejnych testów. Na podstawie opracowanych schematów blokowych wykazano, że dogłębna analiza technologii testów DST może poprawić jakość i kompletność uzyskiwanych rezultatów oraz umożliwić podejmowanie efektywnych decyzji technologicznych w procesie udostępniania złóż oraz oceny produktywności badanych utworów.
The problems related to the use of DST tests in works related to hydrocarbon deposits exploration and development are addressed in the paper. The possibility of using results of tests to designing DST technology in recognized deposits, and undertaking technological decisions in the development process are presented on the example of Upper Jurassic–Lower Cretaceous strata of the Carpathian Foredeep. At the stage of designing, the following elements were planned to be taken into account in the DST technology: results of well logs, statistical predictions of reservoir conditions and technological parameters as well as results of technological check-ups of the test itself, applied interpretation methods and processing of obtained results. The possibility of using information obtained from interpretation of DST tests for hydrocarbon deposits recognition was considered. On this basis the main technological parameters can be determined and detailed reservoir diagnostics made on the basis of analysis and interpretation of DST results with traditional Horner method and new log-log method, depending on the quality of the obtained pressure logs. A method of using statistical data from DST tests for designing successive tests was presented on the example of the Upper Jurassic–Lower Cretaceous strata in the Carpathian Foredeep. The analysis of the block diagrams revealed that a thorough study of the DST technology may increase the quality and completeness of the results and enable undertaking efficient technological decisions about the development of deposits and evaluating productivity of the analyzed strata.
Źródło:
Gospodarka Surowcami Mineralnymi; 2014, 30, 3; 129-143
0860-0953
Pojawia się w:
Gospodarka Surowcami Mineralnymi
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New albanerpetontid amphibians from the Early Cretaceous of Morocco and Middle Jurassic of England
Autorzy:
Gardner, J D
Evans, S.E.
Sigogneau-Russell, D.
Powiązania:
https://bibliotekanauki.pl/articles/21595.pdf
Data publikacji:
2003
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
Early Cretaceous
Middle Jurassic
Cretaceous
England
Albanerpetontidae
amphibian
albanerpetontid amphibian
Ramonellus
Morocco
Jurassic
paleontology
Lissamphibia
Opis:
A third albanerpetontid genus, Anoualerpeton gen. nov., is erected for two new species: An. unicussp. nov. (type species) from the Early Cretaceous (Berriasian) of Morocco and An. priscus sp. nov. from the Middle Jurassic (late Bathonian) of England. Anoualerpeton differs from the exclusively Laurasian albanerpetontid genera Albanerpeton (Early Cretaceous– Paleocene, North America; Miocene, Europe) and Celtedens (?Late Jurassic and Early Cretaceous, Europe) in a unique combination of primitive and derived character states of the jaws and azygous frontals. Monophyly of Anoualerpeton is supported by two synapomorphies of the maxilla and dentary (occlusal margin convex in labial outline and teeth strongly heterodont in size anteriorly) that are convergent with an unrelated, relatively derived Late Cretaceous species of Albanerpeton from North America. The two species of Anoualerpeton differ in character states of the premaxilla and azygous frontals. Cladistic analysis of 20 characters scored for ten albanerpetontid taxa postulates Anoualerpeton as the sister−taxon of Albanerpeton + Celtedens. The sister−pair of Albanerpeton + Celtedensis founded on one or, perhaps, two premaxillary synapomorphies. Anoualerpeton unicus documents the only known Gondwanan occurrence for the Albanerpetontidae and provides a minimum age of basal Cretaceous for the establishment of the clade in Africa. Characters of the mandible, vertebrae, and limbs support the interpretation that Ramonellus (Aptian; Israel) is a caudate, not an albanerpetontid.
Źródło:
Acta Palaeontologica Polonica; 2003, 48, 2
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Late Jurassic–Early Cretaceous oysters from Siberia: a systematic review
Autorzy:
KOSENKO, IGOR N.
Powiązania:
https://bibliotekanauki.pl/articles/945953.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
bivalvia
ostreoidea
gryphaeidae
jurassic
cretaceous
siberia
Opis:
The present study reviews the taxonomy of Late Jurassic–Early Cretaceous oysters from the Northern and the Subpolar Urals (Western Siberia) and northern East Siberia. Previous studies have documented 10 species from the genus Liostrea (L. delta, L. cucurbita, L. praeanabarensis, L. anabarensis, L. plastica, L. gibberosa, L. planoconvexa, L. siberica, L. uralensis, L. lyapinensis), and 3 species from the genus Gryphaea (G. borealis and 2 species in open nomenclature). Liostrea gibberosa, L. planoconvexa, L. uralensis, and L. cucurbita are transferred in this study to the genus Pernostrea. Furthermore, two new species of Pernostrea are described: P. mesezhnikovi sp. nov. and P.? robusta sp. nov. Liostrea siberica is transferred to the genus Praeexogyra. Liostrea praeanabarensis and L. anabarensis are attributed to the subgenus Boreiodeltoideum (genus Deltoideum) as well as L. delta sensu Zakharov (1966) which is described here as new species Deltoideum (Boreiodeltoideum) borealis sp. nov. The similar shell morphology of the genera Deltoideum and Pernostrea provides a basis to establish the new tribe Pernostreini trib. nov. in the subfamily Gryphaeinae. Three species are recorded for the first time from Siberia: Nanogyra? cf. thurmanni, “Ostrea” cf. moreana and Gryphaea (Gryphaea) curva.
Źródło:
Acta Palaeontologica Polonica; 2017, 62, 4; 759-778
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Foraminifera from the Late Jurassic and Early Cretaceous carbonate platform facies of the southern part of the Crimea Mountains, Southern Ukraine
Autorzy:
Krajewski, M.
Olszewska, B.
Powiązania:
https://bibliotekanauki.pl/articles/191714.pdf
Data publikacji:
2007
Wydawca:
Polskie Towarzystwo Geologiczne
Tematy:
foraminifers
dinoflagellata
Upper Jurassic
Lower Cretaceous
Crimea
Opis:
Upper Jurassic and Lower Cretaceous deposits of the Crimea Peninsula are rich in microfossils frequently used for stratigraphic interpretations. In case of foraminifera, the research has been carried predomi- nantly on assemblages obtained by washing the rock samples. The present paper is based on investigations of thin sections from the more indurated sediments that seldom were objects of study. Its goal was to obtain additional information on age and environment of sediments studied. Over 250 thin sections from 16 surface outcrops yielded abundant foraminifera from which over fourty are described herein. Many foraminiferal species (e.g., Labirynthina mirabilis, Parurgonina caelinensis, Neokilianina rahonensis, Amijella amiji, Anchispirocyclina lusitanica) are stratigraphically significant and known from the Kimmeridgian-Tithonian of the Mediterranean Tethys. The Early Cretaceous fauna is represented by Protopeneroplis ultragranulata, Everticyclammina kelleri, Nautiloculina bronnimanni, Monsalevia salevensis, and Mayncina bulgarica. Generally, the investigated fauna is typical for paleoenvironment of the carbonate platform. Older (Kimmeridgian-Tithonian) assemblages represent the inner, and younger (Berriasian) outer parts of the platform. Palaeogeographic distribution of many species described from the studied area indicates their affiliation with cosmopolitan biota known from the north Tethyan shelf. Additionally, few calcareous cysts of Dinoflagellata have been identified and described.
Źródło:
Annales Societatis Geologorum Poloniae; 2007, 77, No 3; 291-311
0208-9068
Pojawia się w:
Annales Societatis Geologorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
First evidence of a mamenchisaurid dinosaur from the Upper Jurassic-Lower Cretaceous Phu Kradung Formation of Thailand
Autorzy:
Suteethorn, S.
Le Loeuff, J.
Buffetaut, E.
Suteethorn, V.
Wongko, K.
Powiązania:
https://bibliotekanauki.pl/articles/20480.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
first evidence
mamenchisaurid dinosaur
dinosaur
Dinosauria
Mamenchisauridae
Jurassic
Cretaceous
Upper Jurassic
Lower Cretaceous
Phu Kradung Formation
Thailand
paleontology
Opis:
An isolated posterior cervical vertebra of a sauropod discovered at Phu Dan Ma (Kalasin Province, northeastern Thailand) is the first informative postcranial specimen from the Phu Kradung Formation, a Upper Jurassic to Lower Cretaceous continental unit. The vertebra is referred to the family Mamenchisauridae, otherwise mainly known from China. In addition, spatulate teeth from the same formation and a mid−dorsal vertebra from the Upper Jurassic Khlong Min Formation of southern Thailand are reassigned to this family. The occurrence of mamenchisaurids in the earliest Cretaceous of Thailand supports a hypothesis of geographical isolation of Central, Eastern, and Southeast Asia during the Late Jurassic. It also suggests that the main changes in their dinosaur assemblages occurred during the Early Cretaceous, rather than at the Jurassic–Cretaceous boundary.
Źródło:
Acta Palaeontologica Polonica; 2013, 58, 3
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Jurassic and Cretaceous primitive crabs of the family Prosopidae (Decapoda: Brachyura) - their taxonomy, ecology and biogeography
Jurajskie i kredowe prymitywne kraby z rodziny Prosopidae (Decapoda: Brachyura) - ich taksonomia, ekologia i biogeografia
Autorzy:
Müller, P.
Krobicki, M.
Wehner, G.
Powiązania:
https://bibliotekanauki.pl/articles/191260.pdf
Data publikacji:
2000
Wydawca:
Polskie Towarzystwo Geologiczne
Tematy:
Decapoda
family Prosopidae
Jurassic
Cretaceous
taxonomy
palaeoecology
palaeobiogeography
Opis:
The Prosopidae is an extinct family, consisting mostly of Mesozoic species. Most probably it accommodates the ancestors of all brachyurans in the large sense. The family appeared in the Late Pliensbachian and disappeared at the Early Palaeocene. Evolution of the Prosopidae, and therefore, brachyuran evolution started on Middle Jurassic, shallow, soft bottom marine environments. The world-wide Callovian transgression made possible the formation of bioherms and reefs in the Late Jurassic, creating ecological niches for the rapidly differentiating prosopids. These crabs migrated rapidly all over Europe in the Oxfordian and began to flourish and massively occupied sponge megafacies from Portugal to Poland. In the Kimmeridgian, the area of known prosopids shrank, which has probably been connected with decreasing of the reef facies. In turn, a Tithonian regression in the per-Tethyan area resulted in changes of habitats and in colonisation of the coral reefs. When reef facies retreated at the Jurassic-Cretaceous boundary, the favourable conditions for crab development also vanished, so the known Cretaceous prosopids are rare and spatially dispersed. In Tertiary, the closely related descendants of them, homolodromiids, inhabited preferably soft muddy bottoms in deeper, colder waters.
Kraby z rodziny Prosopidae, reprezentowane są prawie wyłącznie przez gatunki mezozoiczne. Z filogenetycznego punktu widzenia, są one prawdopodobnie przodkami wszystkich pozostałych gatunków krabów. Przedstawiciele tej rodziny znani są od późnego pliensbachu do wczesnego paleocenu. Ewolucja prosopidów, a poprzez to ewolucja pozostałych krabów, rozpoczęła sią w środkowojurajskich, płytkich środowiskach morskich o miękkim charakterze dna. Ogólnoświatowa transgresja kelowejska stworzyła dogodne warunki do powstania różnorodnych bioherm i raf w późnej jurze, które stanowiły nisze ekologiczne dla szybko różnicujących się dzięki temu krabów z rodziny Prosopidae. Kraby te migrowały gwałtownie na całą Europę w oksfordzie, masowo zasiedlając megafację gąbkową i są obecnie znajdowane w utworach tej facji od Portugalii do Polski. W kimerydzie obszar występowania prosopidów wyraźnie się skurczył, co było prawdopodobnie związane ze stopniowym zanikiem tej facji. Z kolei w tytonie regresja w obszarach perytetydzkich spowodowała zmianę środowiska życia krabów i kolonizację przez nie raf koralowych. Dogodne warunki dla rozwoju tych krabów gwałtownie się pogorszyły blisko granicy jury i kredy (zanikanie facji rafowych) skutkiem czego kredowe prosopidy są rzadkie i geograficznie rozproszone. W trzeciorzędzie najbliżsi potomkowie rodziny Prosopidae - kopalni przedstawiciele rodziny Homolodromiidae - zasiedlili środowiska miękkich den głębszych i zimniejszych mórz.
Źródło:
Annales Societatis Geologorum Poloniae; 2000, 70, 1; 49-79
0208-9068
Pojawia się w:
Annales Societatis Geologorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The completeness of the fossil record of plesiosaurs, marine reptiles from the Mesozoic
Autorzy:
TUTIN, SAMUEL L.
BUTLER, RICHARD J.
Powiązania:
https://bibliotekanauki.pl/articles/945627.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
plesiosauria
ichthyosauria
diversity
macroevolution
sea level
jurassic
cretaceous
Opis:
Plesiosaurs were a highly successful group of marine reptiles occurring worldwide in the Jurassic and Cretaceous, but to date few studies have focused on their preservation through time. Here, we conduct the first detailed assessment of the quality of the plesiosaur fossil record. Data was compiled for 178 specimens representing 114 valid species. For each species we calculated the character completeness metric (CCM: percentage of phylogenetic characters from a cladistic dataset that can be scored for that species) and the skeletal completeness metric (SCM: percentage of the overall skeleton that is preserved for that species). Average CCM and SCM values were calculated for individual geological stages. A strong significant positive correlation was recovered between CCM and SCM, suggesting that the two metrics are recording the same signal, at least for this clade. Although a significant correlation between changes in sea level and changes in plesiosaur completeness was not recovered, an underlying negative relationship may be present but obscured by poorly sampled time bins. Plesiosaur completeness though time is not significantly correlated with that for contemporary terrestrial groups (sauropods, pterosaurs, birds), but is significantly correlated with that for ichthyosaurs, suggesting common controls on skeletal preservation in the marine realm. Significantly higher median completeness values in plesiosaurs and ichthyosaurs than in contemporary terrestrial groups support the hypothesis that the marine tetrapod fossil record is more complete than that of terrestrial tetrapods. A collector’s curve for plesiosaurs shows a generally slow constant rate of discovery from the latter part of the 19th century until the 1990s, at which point the rate of discovery increased substantially and shows no sign of slowing. A significant but very weak negative correlation between SCM and the year in which a taxon was named suggests a weak tendency for more recently named species to have less complete skeletons.
Źródło:
Acta Palaeontologica Polonica; 2017, 62, 3; 563-573
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wapiennik Breccia Member (Pieniny Klippen Belt, Poland) - revised stratigraphy and origin
Autorzy:
Arabas, A.
Sidorczuk, M.
Olszewska, B.
Powiązania:
https://bibliotekanauki.pl/articles/2059007.pdf
Data publikacji:
2011
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Jurassic
Cretaceous
Pieniny Klippen Baisin
breccia
foraminifera
microfacies
Opis:
The Wapiennik Breccia Member was originally attributed to the Czorsztyn Limestone Formation of the Czorsztyn Succession in the Pieniny Klippen Basin. The breccia was assigned previously to the Callovian-Oxfordian. Based on micropalaeontological and microfacies studies we have determined its age as late Albian. At this time the Czorsztyn Swell was affected by extensional faulting, with subsequent submarine erosion of scarps. The re-evaluated age of the breccia, as well as the lithology of its clasts and its matrix that contains Cretaceous foraminifera, indicate the assignment of the Wapiennik Breccia Member to the Chmielowa Formation.
Źródło:
Geological Quarterly; 2011, 55, 1; 49-62
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Upwelling regime in the Carpathian Tethys: a Jurassic-Cretaceous palaeogeographic and paleoclimatic perspective
Autorzy:
Golonka, J.
Krobicki, M.
Powiązania:
https://bibliotekanauki.pl/articles/2059324.pdf
Data publikacji:
2001
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Tethys
Carpathians
Jurassic
Cretaceous
palaeogeography
palaeoclimate
palaeoecology
upwelling
Opis:
Jurassic and Cretaceous global palaeogeographic reconstructions show a changing configuration of mountains, land, shallow seas and deep ocean basins, and these are used as input for paleoclimatic modelling. We have generated Oxfordian-Kimmeridgian, Tithonian-Berriasian and Barremian-Hauterivian paleoclimatic maps, showing air pressure, wind directions, humidity zones and areas favourable to upwelling conditions, modelled by the PALEOCLIMATE program and plotted on the palaeogeographic background. Paleoclimate modelling suggests that prevailing Jurassic-Cretaceous winds in the northern Tethys area came from south-south-west, and may have been parallel to the Czorsztyn Ridge, uplifted as a result of extension during the Jurassic supercontinental breakup. Upwelling may have been induced at the southeastern margin of the ridge. The model is consistent with the rock records within the earliest Cretaceous deposits. The presence of phosphates and a palaeoenvironmental analysis of benthic fauna support the upwelling model.
Źródło:
Geological Quarterly; 2001, 45, 1; 15-32
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 50

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