Artigos de revistas: "Kimmeridgium"

1

Weiss, Michael. "Neue Ostracoden aus dem Kimmeridgium NW-Deutschlands". Paläontologische Zeitschrift 70, n.º 3-4 (novembro de 1996): 461–74. http://dx.doi.org/10.1007/bf02988085.

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2

Schudack, M. E. "Some charophytes from the middle dinosaur member of the Tendaguru formation (Upper Jurassic of Tanzania)". Fossil Record 2, n.º 1 (1 de janeiro de 1999): 201–5. http://dx.doi.org/10.1002/mmng.1999.4860020115.

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Abstract. Biostratigraphy and paleoecology of the famous dinosaur beds of Tendaguru Formation, Tanzania, East Africa are still under discussion. Calcareous microfossils have not yet contributed to this question. Four samples from the Middle Dinosaur Member have now yielded charophyte gyrogonites of the species Aclistochara cf. bransonii, Aclistochara cf. minor, Mesochara canellata, and Mesochara harrisi. Considering ammonite datations in under- and overlying members, even their long stratigrapical ranges point to a Kimmeridgian age for the Middle Dinosaur Member of Tendaguru Formation. Salinity tolerances of the species (if autochthonous) suggest a variable environment with partly brackish, partly freshwater influences. Biostratigraphie und Paläoökologie der berühmten Dinosaurier-Fundschichten am Tendaguru Hill in Tansania (Ostafrika) sind bis heute umstritten. Kalkige Mikrofossilien hatten zu dieser Diskussion bisher nicht beigetragen. In vier Proben aus dem Mittleren Dinosauriermergel fanden sich nun Charophyten-Gyrogonite der Arten Aclistochara cf. bransonii, Aclistochara cf. minor, Mesochara canellata und Mesochara harrisi. Trotz generell langer stratigraphischer Reichweiten dieser Arten macht ihr Vorkommen im Zusammenhang mit Ammonitenfunden in unter- und überlagernden Schichten ein Kimmeridgium-Alter des Mittleren Dinosauriermergels wahrscheinlich, während ihre Salinitätstoleranzen (autochthones Vorkommen vorausgesetzt) auf ein wechselhaftes Milieu mit teils schwach brackischen, teils Süßwassereinflüssen hindeuten. doi:10.1002/mmng.1999.4860020115

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3

Schweigert, Günter, e Gerd Dietl. "Miscellanea aus dem Nusplinger Plattenkalk (Ober-Kimmeridgium, Schwäbische Alb) 7. Fossile Holzkohle". Jahresberichte und Mitteilungen des Oberrheinischen Geologischen Vereins 88 (18 de abril de 2006): 85–92. http://dx.doi.org/10.1127/jmogv/88/2006/85.

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4

Schweigert, G., e G. Dietl. "Miscellanea aus dem Nusplinger Plattenkalk (Ober-Kimmeridgium, Schwäbische Alb) 6. Das Spurenfossil Telsonichnus". Jahresberichte und Mitteilungen des Oberrheinischen Geologischen Vereins 87 (29 de março de 2005): 431–38. http://dx.doi.org/10.1127/jmogv/87/2005/431.

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5

Schweigert, Günter, Gerd Dietl e Rupert Wild. "Miscellanea aus dem Nusplinger Plattenkalk (Ober-Kimmeridgium, Schwäbische Alb) 3. Ein Speiballen mit Flugsaurierresten". Jahresberichte und Mitteilungen des Oberrheinischen Geologischen Vereins 83 (17 de abril de 2001): 357–64. http://dx.doi.org/10.1127/jmogv/83/2001/357.

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6

Schweigert, Günter, e Gerd Dietl. "Aptychen-Formgattung Miscellaneous from the Nusplingen Lithographic Limestone (Upper Kimmeridgian, Swabian Alb) 9. A new form-genus of aptychi". Jahresberichte und Mitteilungen des Oberrheinischen Geologischen Vereins 90 (25 de março de 2008): 45–55. http://dx.doi.org/10.1127/jmogv/90/2008/45.

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7

Schweigert, Günter. "Miscellaneous from the Nusplingen Lithographic Limestone (Upper Kimmeridgian, Swabian Alb). 18. Bridgman fractures". Jahresberichte und Mitteilungen des Oberrheinischen Geologischen Vereins 99 (11 de março de 2017): 545–52. http://dx.doi.org/10.1127/jmogv/99/0018.

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8

Schweigert, Günter, e Jürgen Härer. "Miscellaneous from the Nusplingen Lithographic Limestone (Upper Kimmeridgian, Swabian Alb). 22. Ammonites with preserved septa". Jahresberichte und Mitteilungen des Oberrheinischen Geologischen Vereins 103 (11 de abril de 2021): 291–98. http://dx.doi.org/10.1127/jmogv/103/0009.

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9

Baier, Johannes, e Günter Schweigert. "On the occurrence of Aulacostephanus yo (d'Orbigny) in Swabia (Late Kimmeridgian, SW Germany)". Neues Jahrbuch für Geologie und Paläontologie - Monatshefte 2001, n.º 3 (8 de março de 2001): 184–92. http://dx.doi.org/10.1127/njgpm/2001/2001/184.

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10

Schweigert, Günter, e Gerd Dietl. "Miscellaneous from the Nusplingen Lithographic Limestone (Upper Kimmeridgian, Swabian Alb). 10. Sliding marks and roll marks". Jahresberichte und Mitteilungen des Oberrheinischen Geologischen Vereins 91 (14 de abril de 2009): 89–99. http://dx.doi.org/10.1127/jmogv/91/2009/89.

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11

Schweigert, Günter, Helmut Keupp, Christain Klug e Armin Scherzinger. "Miscellaneous from the Nusplingen Lithographic Limestone (Upper Kimmeridgian, Swabian Alb)". Jahresberichte und Mitteilungen des Oberrheinischen Geologischen Vereins 98 (11 de março de 2016): 215–25. http://dx.doi.org/10.1127/jmogv/98/0014.

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12

Schweigert, Günter, e Gerd Dietl. "Miscellanea aus dem Nusplinger Plattenkalk (Ober-Kimmeridgium, Schwäbische Alb) 5. In-situ Bernstein in Araukarien-Zapfenschuppen". Jahresberichte und Mitteilungen des Oberrheinischen Geologischen Vereins 85 (22 de abril de 2003): 473–83. http://dx.doi.org/10.1127/jmogv/85/2003/473.

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13

Dietl, Olga, e Günter Schweigert. "Miscellanea aus dem Nusplinger Plattenkalk (Ober-Kimmeridgium, Schwäbische Alb) 5. Thecideen als seltener Bewuchs flottierender Objekte". Jahresberichte und Mitteilungen des Oberrheinischen Geologischen Vereins 86 (13 de abril de 2004): 351–59. http://dx.doi.org/10.1127/jmogv/86/2004/351.

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14

Schweigert, Günter. "Miscellaneous from the Nusplingen Lithographic Limestone (Upper Kimmeridgian, Swabian Alb). 19. Two case studies of exceptionally preserved belemnites". Jahresberichte und Mitteilungen des Oberrheinischen Geologischen Vereins 100 (16 de março de 2018): 509–16. http://dx.doi.org/10.1127/jmogv/100/0015.

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15

Schweigert, Günter, e Armin Scherzinger. "Miscellaneous from the Nusplingen Lithographic Limestone (Upper Kimmeridgian, Swabian Alb). 15. The ammonite genus Virgataxioceras ARKELL". Jahresberichte und Mitteilungen des Oberrheinischen Geologischen Vereins 96 (20 de março de 2014): 341–49. http://dx.doi.org/10.1127/jmogv/96/0015.

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16

Schweigert, Günter, e Gerd Dietl. "Miscellaneous from the Nusplingen Lithographic Limestone (Upper Kimmeridgian, Swabian Alb). 16. The resting trace of an eryonid lobster". Jahresberichte und Mitteilungen des Oberrheinischen Geologischen Vereins 97 (11 de março de 2015): 333–40. http://dx.doi.org/10.1127/jmogv/97/0015.

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17

Schweigert, Günter. "Miscellaneous from the Nusplingen Lithographic Limestone (Upper Kimmeridgian, Swabian Alb). 24. Oysters with xenomorphic sculpture". Jahresberichte und Mitteilungen des Oberrheinischen Geologischen Vereins 105 (17 de maio de 2023): 303–14. http://dx.doi.org/10.1127/jmogv/105/0013.

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18

Schweigert, Günter, e Armin Scherzinger. "Ein Aulacostephanus autissiodorensis (Cotteau) aus der Wirbelberg-Formation (Beckeri-Zone, Ober-Kimmeridgium) des Randen (Schweiz, Kt. Schaffhausen)". Jahresberichte und Mitteilungen des Oberrheinischen Geologischen Vereins 79 (1 de abril de 1997): 45–52. http://dx.doi.org/10.1127/jmogv/79/1997/45.

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19

Dietl, Gerd, e Günter Schweigert. "Der Nusplinger Plattenkalk und seine Fossilien (Weißer Jura zeta, Ober-Kimmeridgium) (Exkursion N am 10. April 1999)". Jahresberichte und Mitteilungen des Oberrheinischen Geologischen Vereins 81 (7 de maio de 1999): 257–71. http://dx.doi.org/10.1127/jmogv/81/1999/257.

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20

Schweigert, Günter. "Miscellaneous from the Nusplingen Lithographic Limestone (Upper Kimmeridgian, Swabian Alb). 20. Unusual fracture behaviour of an oxyconic ammonite shell". Jahresberichte und Mitteilungen des Oberrheinischen Geologischen Vereins 101 (11 de abril de 2019): 349–58. http://dx.doi.org/10.1127/jmogv/101/0014.

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21

Schweigert, Günter. "Miscellaneous from the Nusplingen Lithographic Limestone (Upper Kimmeridgian, Swabian Alb). 21. A shrimp in a turbidite bed". Jahresberichte und Mitteilungen des Oberrheinischen Geologischen Vereins 102 (2 de abril de 2020): 325–32. http://dx.doi.org/10.1127/jmogv/102/0017.

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22

Schweigert, Günter, e Gerd Dietl. "Miscellaneous from the Nusplingen Lithographic Limestone (Upper Kimmeridgian, Swabian Alb). 13. Impact marks on semi-lithified bedding planes". Jahresberichte und Mitteilungen des Oberrheinischen Geologischen Vereins 94 (21 de março de 2012): 43–54. http://dx.doi.org/10.1127/jmogv/94/2012/43.

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23

Schweigert, Günter. "Miscellaneous from the Nusplingen Lithographic Limestone (Upper Kimmeridgian, Swabian Alb). 23. Reproduction of non-rigid sponges of the genus Codites". Jahresberichte und Mitteilungen des Oberrheinischen Geologischen Vereins 104 (31 de maio de 2022): 269–78. http://dx.doi.org/10.1127/jmogv/104/0010.

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24

Schweigert, Günter, e Gerd Dietl. "Miscellaneous from the Nusplingen Lithographic Limestone (Upper Kimmeridgian, Swabian Alb) 11. A leaf fragment with imprints of galls". Jahresberichte und Mitteilungen des Oberrheinischen Geologischen Vereins 92 (6 de abril de 2010): 35–40. http://dx.doi.org/10.1127/jmogv/92/2010/35.

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25

Schweigert, Günter, Matthias Wulf e Gerd Dietl. "Miscellaneous from the Nusplingen Lithographic Limestone (Upper Kimmeridgian, Swabian Alb). 12. The worm tubes of the genus Muensteria Sternberg". Jahresberichte und Mitteilungen des Oberrheinischen Geologischen Vereins 93 (26 de abril de 2011): 89–98. http://dx.doi.org/10.1127/jmogv/93/2011/89.

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26

Schweigert, Günter. "Miscellaneous from the Nusplingen Lithographic Limestone (Upper Kimmeridgian, Swabian Alb). 25. A sea urchin infested by parasitic copepods". Jahresberichte und Mitteilungen des Oberrheinischen Geologischen Vereins 106 (11 de julho de 2024): 307–14. http://dx.doi.org/10.1127/jmogv/106/0014.

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27

Arratia, G. "Remarkable teleostean fishes from the Late Jurassic of southern Germany and their phylogenetic relationships". Fossil Record 3, n.º 1 (1 de janeiro de 2000): 137–79. http://dx.doi.org/10.5194/fr-3-137-2000.

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Complete descriptions, as preservation permits, are provided for new Late Jurassic taxa (e.g., †Ascalabothrissops voelkli n. gen. and n. sp., †Anaethalion zapporum n. sp., and †Elopsomolos frickhingeri n. gen. and n. sp.); the phylogenetic positions of these taxa are given, as well as an evaluation of the European teleosts during the Late Jurassic. The relationships among certain fossil and extant teleosts are evaluated based on 191 unweighted morphological characters by using cladistic principles. The results suggest that †Ascalabothrissops n. gen. from the Kimmeridgian of Schamhaupten is the sister-taxon of †Pachythrissops from the Tithonian of Bavaria, and consequently is an ichthyodectiform. †Anaethalion zapporum n. sp., an elopiform, stands in an unresolved polytomy with †A. angustus, †A. knorri, and a clade formed by †A. angustissimus and more advanced elopiforms. The new results confirm Arratia (1997) that †Anaethalion, as presently understood, is a paraphyletic taxon. †Elopsomolos frickhingeri n. gen. and n. sp. forms a polytomy with †Elopsomolos sp. 1 and 3, and [Elops + Megalops]. Monophyly of the Kimmeridgian and Tithonian genus †Elopsomolos is not certain. Following the new phylogenetic hypothesis, that includes new taxa and new characters, the elopomorphs stand as the primitive sister-group of osteoglossomorphs and more advanced teleosts. The new information does not affect the phylogenetic position of the main extant teleostean clades and confirms previous results by Arratia (1991, 1996, 1997, 1999). The analysis of the elopiforms through time shows that the group had an important radiation during the Late Jurassic, to be replaced by new genera and species during the Cretaceous, and again during the Cenozoic. From numerous genera living in the past, elopiforms are represented now by two genera, Elops and Megalops. Soweit es die Erhaltung zulässt, werden vollständige Beschreibungen der drei neuen spätjurassischen Taxa †Ascalabothrissops voelkli n. gen. et n. sp., †Anaethalion zapporum n. sp., und †Elopsomolos frickhingeri n. gen. et n. sp. gegeben. Die phylogenetische Stellung dieser Taxa als auch anderer spätjurassischer europäischer Teleosteer ist analysiert. Die Verwandtschaftsbeziehungen innerhalb einiger fossiler und rezenter Teleosteer wurden auf der Basis von 191 nicht gewichteten morphologischen Merkmalen mit Hilfe der kladistischen Methode evaluiert. Als Ergebnis zeigt sich, dass †Ascalabothrissops n. gen. aus dem Kimmeridgium von Schamhaupten das Schwestertaxon von †Pachythrissops und damit ein Ichthyodectiformer ist. †Anaethalion zapporum n. sp., ein Elopiformer, steht in einer nicht auflösbaren Polytomie mit †A. angustus, †A, knorri, und einer Gruppe gebildet aus †A. angustissimus und weiter fortgeschrittenen Elopiformen. Die neuen Ergebnisse bestätigen Arratia (1997), dass †Anaethalion, wie zur Zeit umgrenzt, ein paraphylethisches Taxon darstellt. †Elopsomolos frickhingeri n. gen. et n. sp. bildet eine Polytomie mit †Elopsomolos sp. 1 und 3, und [Elops + Megalops]. Die Monophylie der Gattung †Elopsomolos aus dem Kimmeridgium und Tithonium ist nicht gesichert. Nach der neuen phylogenetischen Hypothese, die neue Taxa und neue Merkmale einbezieht, sind die Elopomorphen die primitive Schwestergruppe der Osteoglossomorphen und weiter fortgeschrittener Teleosteer. Die neuen Ergebnisse beeinflussen die phylogenetische Stellung der rezenten Hauptgruppen der Teleosteer nicht und bestätigen frühere Ergebnisse von Arratia (1991, 1996, 1997, 1999). Die Analyse der Elopiformen zeigt, dass die Gruppe eine bedeutende Radiation im Spätjura erlebte; neue Gattungen und Arten traten in der Kreide auf und dann wieder im Känozoikum. Im Gegensatz zu den zahlreichen fossilen Gattungen sind die Elopiformen heute nur durch zwei Gattungen vertreten, Elops und Megalops. doi:<a href="http://dx.doi.org/10.1002/mmng.20000030108" target="_blank">10.1002/mmng.20000030108</a>

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28

Schweigert, Günter, Armin Scherzinger e Gerd Dietl. "Miscellanea aus dem Nusplinger Plattenkalk (Ober-Kimmeridgium, Schwäbische Alb). 14. Die Ammonitengattung Berckhemeria Schweigert & Zeiss Miscellaneous from the Nusplingen Lithographic Limestone (Upper Kimmeridgian, Swabian Alb). [14. The ammonite genus Berckhemeria Schweigert & Zeiss". Jahresberichte und Mitteilungen des Oberrheinischen Geologischen Vereins 95 (1 de abril de 2013): 347–54. http://dx.doi.org/10.1127/jmogv/95/2013/347.

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29

Zeiss, Arnold, e Günter Schweigert. "Lithacoceras nothostephanoides n. sp., a new ammonite species from the youngest Kimmeridgian (Ulmense Subzone) of the Southwestern Swabian Alb (SW Germany)". Neues Jahrbuch für Geologie und Paläontologie - Monatshefte 1999, n.º 9 (21 de outubro de 1999): 551–67. http://dx.doi.org/10.1127/njgpm/1999/1999/551.

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30

Schweigert, Günter, e Gerd Dietl. "Miscellaneous from the Nusplingen Lithographic Limestone (Upper Kimmeridgian, Swabian Alb). 8. New records of the prawn genus Aeger Münster, 1839, and a related trace fossil". Jahresberichte und Mitteilungen des Oberrheinischen Geologischen Vereins 89 (10 de abril de 2007): 105–14. http://dx.doi.org/10.1127/jmogv/89/2007/105.

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31

Atrops, François. "Kimmeridgian". Geobios 27 (dezembro de 1994): 767–69. http://dx.doi.org/10.1016/s0016-6995(94)80244-0.

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32

Cecca, Fabrizio, e Arnold Zeiss. "Kimmeridgian/Tithonian boundary". Geobios 27 (dezembro de 1994): 771–72. http://dx.doi.org/10.1016/s0016-6995(94)80245-9.

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33

Heinrich, W. D., R. Bussert, M. Aberhan, O. Hampe, S. Kapilima, E. Schrank, S. Schultka et al. "The German-Tanzanian Tendaguru Expedition 2000". Fossil Record 4, n.º 1 (1 de janeiro de 2001): 223–37. http://dx.doi.org/10.5194/fr-4-223-2001.

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The celebrated fossil locality of Tendaguru (Tanzania, East Africa) has been well known for its unique Late Jurassic dinosaur assemblages since the early decades of the 20th century. Recently, within the scope of the German-Tanzanian Tendaguru project, an expedition returned to Tendaguru with the aim of collecting microvertebrates, micro- and macroinvertebrates, plant fossils and new sedimentological and stratigraphical data. Applying a multidisciplinary research approach, the data collected were used to address various controversial issues regarding the Tendaguru Beds. These include their exact age, depositional environments and reconstructions of the palaeoecosystems in which the dinosaurs lived. Field work resulted in a new standard section for the Tendaguru Beds. Preliminary biostratigraphic results, based on ammonites, charophytes and palynomorphs, support a Late Kimmeridgian age for the Nerinea Bed, an early Tithonian age for the Trigonia smeei Bed, and an Early Cretaceous (possibly Valanginian to Hauterivian) age for the Trigonia schwarzi Bed. Facies analysis of the Tendaguru Beds indicates environments ranging from storm- and tide-influenced, siliciclastic coastal barrier systems, ooid sand bar complexes and backbarrier tidal flats to sabkha-like coastal plains with brackish lakes and pools. Sedimentological indicators of palaeoclimate and palynological data point to a subtropical to tropical climate with pronounced dry seasons. In concert with sedimentological data, quantitative palaeoecological analysis of macroinvertebrates helped to finetune understanding of environmental factors such as substrate conditions, salinity, sedimentation rate and water depth. Along with abundant microvertebrate remains and fragments of fusain and cuticles, these new data have considerably improved our knowledge of the fauna and flora found in the Tendaguru Beds, and provide a solid basis for developing a better understanding of the Late Jurassic and Early Cretaceous Tendaguru palaeoecosystems. To put the German-Tanzanian Tendaguru expedition in perspective, a brief review of previous activities is given and future research objectives are outlined. Die berühmte Fossilfundstätte Tendaguru (Tansania, Ostafrika) ist seit Anfang des 20. Jahrhunderts weltweit für ihre Dinosaurier aus der späten Jura-Zeit bekannt. Im Rahmen des Deutsch-Tansanischen Tendaguru Projekts fand im August und September 2000 eine Expedition in die Umgebung des Tendaguru-Hügels statt. Ziel der Expedition war es, umfangreiche Fossilaufsammlungen von Mikrovertebraten, Mikro- und Makroinvertebraten und pflanzlichen Fossilien durchzuführen und neue sedimentologische und stratigraphische Daten aufzunehmen. Unter Anwendung eines interdisziplinären Forschungsansatzes wurden mit den gesammelten Daten verschiedene, bisher kontrovers diskutierte Aspekte der Tendaguru-Schichten untersucht. Offene Fragen umfassten die genaue Alterseinstufung, eine Interpretation der Ablagerungsräume und die Rekonstruktion der Paläoökosysteme, in denen die Dinosaurier lebten. Die erste Auswertung der Geländedaten führte zu einem neuen Standardprofil für die Tendaguru-Schichten. Vorläufige biostratigraphische Ergebnisse, die auf Ammoniten, Charophyten und Palynomorphen basieren, sprechen für ein Ober-Kimmeridgium Alter der Nerineen Schicht, Unteres Tithonium für die Trigonia smeei Schicht und Untere Kreide (möglicherweise Valanginium bis Hauterivium) für die Trigonia schwarzi Schicht. Die Lebens- und Ablagerungsräume der Tendaguru-Schichten reichten von sturm- und gezeitenbeeinflussten, küstennahen, siliziklastischen Barrieresystemen und Kalkooid-Barren über ausgedehnte Wattflächen bis zu sabkha-artigen Küstenebenen mit brackischen Seen und Tümpeln. Sedimentologische Anzeiger des Paläoklimas und palynologische Daten sprechen für ein subtropisches bis tropisches Klima mit ausgeprägten Trockenzeiten. Im Verbund mit sedimentologischen Daten ermöglicht die quantitative paläoökologische Analyse der Makroinvertebraten eine genauere Charakterisierung wichtiger physikalischer Umweltparameter wie Substrateigenschaften. Salinität. Sedimentationsrate und Bathymetrie. Zusammen mit den häufig vorkommenden Mikrovertebraten und Bruchstücken von Fusit und Cuticulen haben diese neu gewonnenen Daten die Kenntnisse über die Faunen und Floren der Tendaguru-Schichten erheblich erweitert und liefern die Basis für ein besseres Verständnis der in den Ablagerungen dokumentierten Ökosysteme aus Jura- und Kreidezeit. Neben einem kurzen Abriss der Forschungsgeschichte werden die für die Zukunft geplanten Forschungsaktivitäten dargestellt. doi:<a href="http://dx.doi.org/10.1002/mmng.20010040113" target="_blank">10.1002/mmng.20010040113</a>

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BARSKI, Marcin. "Dinoflagellate cyst assemblages across the Oxfordian/Kimmeridgian boundary (Upper Jurassic) at Flodigarry, Staffin Bay, Isle of Skye, Scotland – a proposed GSSP for the base of the Kimmeridgian". Volumina Jurassica XV, n.º 1 (6 de setembro de 2018): 51–62. http://dx.doi.org/10.5604/01.3001.0012.4594.

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Examination of seven ammonite-calibrated palynological samples across the Oxfordian/Kimmeridgian boundary in the Flodigarry sections at Staffin Bay, Isle of Skye, northern Scotland, has revealed dinoflagellate cyst assemblages in general terms in line with previous contributions. The sparse occurrence of Emmetrocysta sarjeantii, Perisseiasphaeridium pannosum and Senoniasphaera jurassica slightly above the proposed Oxfordian/Kimmeridgian boundary may be used as a palynological approximation of the base of the Kimmeridgian. The high abundance of tests resembling modern zygnemataceous chlorophycean alga Spirogyra in two samples above the Oxfordian/Kimmeridgian boundary horizon is probably associated with increased eutrophication and possible association with ‟green tides”. This bloom is proposed as a palynofloral proxy event for the boundary in the Flodigarry section. According to previous studies, various eutrophication events may have a correlation potential in Subboreal Europe.

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Danelian, Taniel, Patrick De Wever e Michel Durand-Delga. "Revised radiolarian ages for the sedimentary cover of the Balagne ophiolite (Corsica, France). Implications for the palaeoenvironmental evolution of the Balano-Ligurian margin". Bulletin de la Société Géologique de France 179, n.º 3 (1 de maio de 2008): 289–96. http://dx.doi.org/10.2113/gssgfbull.179.3.289.

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Abstract The age of radiolarites covering the Balagne ophiolite is reassessed based on new and revised radiolarian fossil evidence. The oldest radiolarian cherts are dated as upper Bathonian-lower Callovian in two tectonic units: San Colombano and Novella. These are amongst the oldest ages available so far from ophiolites of the Ligurian ocean. An important stratigraphic gap, spanning the Callovian-early Kimmeridgian interval, is specified between radiolarites and the overlying (and locally gullying) San Colombano shallow-water limestones (sub-unit I). We can now specify that radiolarian ooze accumulated until the late Kimmeridgian in the distal parts of the Balagne margin (sub-unit SC III and Novella unit), while fragments of Hercynian basement fell into the Balagne basin during the late Kimmeridgian-Tithonian.

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Wilkinson, Ian P. "Eripleura, a new genus of ostracod from the Upper Jurassic of England and its relationship with Procytheropteron Ljubimova". Journal of Micropalaeontology 6, n.º 1 (1 de maio de 1987): 111–16. http://dx.doi.org/10.1144/jm.6.1.111.

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Abstract. A new genus of cytherurid ostracod, Eripleura, with the type species E. eleanorae sp. nov. from the Upper Oxfordian (? rosenkrantzi Zone) and Lower Kimmeridgian (baylei Zone) of southern England is described and compared with Procytheropteron. Two further species are described for the first time, Eripleura obliquicosta from the Lower Kimmeridgian cymodoce Zone, and Procytheropteron? elongatum from the Upper Oxfordian tenuiserratum Zone.

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Enay, Raymond. "Recalage biostratigraphique et nouvelle datation de surfaces d'emersion du Kimmeridgien-Tithonien dans le Jura meridional et consequences sur leur interpretation sequentielle". Bulletin de la Société Géologique de France 171, n.º 6 (1 de novembro de 2000): 665–71. http://dx.doi.org/10.2113/171.6.665.

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Abstract In various recent studies the area of Saint-Germain-de-Joux (Ain Department, France) has been used as a reference to define a new major sequence boundary that was added to the Exxon cycle chart and assigned to the Kimmeridgian-Tithonian boundary. Within the reef complex of Saint-Germain-de-Joux the new sequence boundary SB 140 is believed to be represented by the horizon overlain by a black-pebble conglomerate. A comprehensive survey of the biostratigraphical data already published proves the age of the discontinuity to be in fact late Kimmeridgian, Beckeri Zone. Following recent refinement of the vertical range of the species of the genus Gravesia, the Kimmeridgian-Tithonian boundary is now placed within the Gravesia beds in the lower part of the bioturbated limestone ("Calcaires a tubulures") of the Couches du Chailley Fm.

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Cope, John C. W. "Towards a unified Kimmeridgian Stage". Petroleum Geoscience 1, n.º 4 (novembro de 1995): 351–54. http://dx.doi.org/10.1144/petgeo.1.4.351.

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Tchoumatchenco, Platon, Marlena Yaneva, Elena Koleva-Rekalova, Kristalina Stoykova e Daria Ivanova. "Jurassic stratigraphy of the section Staro selo, Pernik District, Southwestern Bulgaria". Geologica Balcanica 35, n.º 1-2 (30 de junho de 2005): 39–61. http://dx.doi.org/10.52321/geolbalc.35.1-2.39.

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The onset of the Jurassic sedimentation in the region of Pernik (southwestern Bulgaria) is at the end of Bajocian with deposition of sandstones (Lyalintsi Member of Gradets Fm.) and continuing during the Bathonian with bioclastic limestones (Polaten Fm.). The section Staro selo is one of the most complete Jurassic sections in Southwest Bulgaria. It is studied from several points of view: lithofacial, depositional processes, biostratigraphic and sequence stratigraphic. In Bajocian-Bathonian interval four 3rd order depositional sequences are individualized: Bj 5, Bat 0, Bat 1 and Bat 2. After a break of sedimentation (Callovian-Oxfordian), the limestones of Gintsi (Lower Kimmeridgian) and Drugan (Middle Kimmeridgian) Formation were deposited in which 3 depositional sequences were recognized (Kim 2-Kim 4). Nineteen depositional sequences of 3rd order are individualized (Kim 5-Ti 1.1-Ti 1.13, Ti 2, Ti 3.1-Ti3.2, Ti 4, Ti 5) in the sediments of Neshkovtsi Formation (Upper Kimmeridgian) and in the Bobovo Member of Kostel Formation (Uppermost Kimmeridgian – Upper Tithonian in the studied area). The recognition of the depositional sequences is based chiefly on the geometry and the superposition of the calcareous and siliciclastic sediments. The divided depositional sequences are compared to those of Western European scheme of Hardenbol et al. (1998). Within the carbonate part of the succession they are of the same number and in the siliciclastic part they are more numerous.

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Marinov, Vladimir, Alexander Alifirov, Alexander Kudamanov e Varvara Bumagina. "CALLOVEAN AND UPPER JURASSIC CONSTRUCTION ON EM-EKOVSKOE FIELD (WESTERN SIBERIA)". Interexpo GEO-Siberia 2, n.º 1 (2019): 87–94. http://dx.doi.org/10.33764/2618-981x-2019-2-1-87-94.

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The results of litho-bio-stratigraphic studies of Callovian and Upper Jurassic of the Em-Ega oil field (Western Siberia) are presented. The formation of sediments took place in the sea basin and had a pulsating character. Episodes of sediment accumulation were replaced by periods of a sharp shortage of terrigenous material. The main stages of the arrival of terrigenous material were Callovian, Middle and Late Oxfordian, Early Kimmeridgian and Middle and Late Volgian. In Early Oxfordian, Late Kimmeridgian, Early Volgian deposits did not accumulate.

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Püntener, Christian, Jérémy Anquetin e Jean-Paul Billon-Bruyat. "Thalassemys bruntrutanan. sp., a new coastal marine turtle from the Late Jurassic of Porrentruy (Switzerland), and the paleobiogeography of the Thalassemydidae". PeerJ 3 (29 de setembro de 2015): e1282. http://dx.doi.org/10.7717/peerj.1282.

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Background.The Swiss Jura Mountains are a key region for Late Jurassic eucryptodiran turtles. Already in the mid 19th century, the Solothurn Turtle Limestone (Solothurn, NW Switzerland) yielded a great amount of Kimmeridgian turtles that are traditionally referred to Plesiochelyidae, Thalassemydidae, and Eurysternidae. In the past few years, fossils of these coastal marine turtles were also abundantly discovered in the Kimmeridgian of the Porrentruy region (NW Switzerland). These findings include numerous sub-complete shells, out of which we present two new specimens ofThalassemys(Thalassemydidae) in this study.Methods.We compare the new material from Porrentruy to the type speciesTh. hugii, which is based on a well preserved specimen from the Solothurn Turtle Limestone (Solothurn, Switzerland). In order to improve our understanding of the paleogeographic distribution ofThalassemys, anatomical comparisons are extended toThalassemysremains from other European countries, notably Germany and England.Results.While one of the twoThalassemysspecimens from Porrentruy can be attributed toTh. hugii, the other specimen represents a new species,Th. bruntrutanan. sp. It differs fromTh. hugiiby several features: more elongated nuchal that strongly thickens anterolaterally; wider vertebral scales; proportionally longer plastron; broader and less inclined xiphiplastron; wider angle between scapular process and acromion process. Our results show thatTh. hugiiandTh. bruntrutanaalso occur simultaneously in the Kimmeridgian of Solothurn as well as in the Kimmeridgian of England (Kimmeridge Clay). This study is an important step towards a better understanding of the paleobiogeographic distribution of Late Jurassic turtles in Europe.

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Bujtor, László, Richárd Albrecht, Csaba Farkas, Bertalan Makó, Dávid Maróti e Ákos Miklósy. "Kimmeridgian and early Tithonian cephalopods from the Kisújbánya Limestone Formation, Zengővárkony (Mecsek Mountains, southern Hungary), their faunal composition, palaeobiogeographic affinities, and taphonomic character". Carnets de géologie (Notebooks on geology) 21, n.º 13 (4 de julho de 2021): 265–314. http://dx.doi.org/10.2110/carnets.2021.2113.

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A new collection at Zengővárkony (Mecsek Mountains, Hungary) provided a rich and diverse but poorly preserved cephalopod-dominated fossil assemblage representing the Kimmeridgian and the lower Tithonian. The material came from mixed scree, soil, and amongst roots affected by weathering processes having been exposed to the elements for a long time. The nautiloid Pseudaganides strambergensis is the first record from the Mecsek Mountains. Due to the weathering, the ammonite fauna consists of mainly fragmentary and dissolved individuals that comprises 528 specimens belonging to 34 species and 30 genera out of which 20 species and 15 genera are reported for the first time from the Mecsek Mountains. The fauna includes specimens of known taxa. No new taxa are introduced. Based on the comparison with other faunas, this assemblage most closely resembles the fauna of the Venetian Alps (Italy). Additional faunal elements include aptychi (Laevaptychus latus, Lamellaptychus murocostatus), belemnites (Hibolithes semisulcatus), and an indetermined brachiopod. The first record of Spiraserpula spirolinites, an encrusting fossil polychaete preserved on the internal mould of a Taramelliceras shell fragment indicates favourable bottom conditions for the epifauna. The presence of Aspidoceras caletanum, Gravesia aff. gigas, and Pseudowaagenia inerme indicates faunal connections with the Submediterranean Province of the Tethys, which is in line with the tectonic and palaeogeographical position of the Mecsek Zone during the Late Jurassic. The ammonite assemblage represents elements of five Tethysian ammonite zones of the Kimmeridgian and Tithonian. The lower Kimmeridgian Herbichi Zone is indicated by Streblites tenuilobatus and Praesimoceras herbichi. The upper Kimmeridgian Acanthicum Zone is indicated by Aspidoceras acanthicum, and the Cavouri Zone by Mesosimoceras cavouri and Aspidoceras caletanum. The upper Kimmeridgian Beckeri Zone is suggested by Hybonoticeras pressulum and Pseudowaagenia inerme. Whereas Gravesia aff. gigas, Lithacoceras aff. siliceum, and Malagasites? denseplicatus are faunal elements characterising the Early Tithonian Hybonotum Zone. Phylloceratid and lytoceratid specimens account only for 12% of the fauna, while the majority of the specimens belong to the Oppeliidae and Ataxioceratidae (60%).

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Schudack, U., e M. E. Schudack. "Ostracods from the Upper Jurassic (Oxfordian-Tithonian) of southern Germany". Journal of Micropalaeontology 19, n.º 2 (1 de dezembro de 2000): 97–112. http://dx.doi.org/10.1144/jm.19.2.97.

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Abstract. At present the ostracod faunas from the Upper Jurassic of southern Germany are incompletely known due to the absence of detailed studies. This preliminary systematic investigation has yielded 46 species from 25 genera, of which 23 species are left in open nomenclature, while 4 are new species: Bythoceratina (Praebythoceratina) danuvensis, Nemoceratina (Pariceratina) urlichsi, Pokornyopsis punctata and Quasihermanites spiralus. Diversity increases through the late Jurassic with 16 species in the Oxfordian, 19 species in the Kimmeridgian, and 23 species in the Tithonian. Endemism is lowest in the Oxfordian, while highest in the Kimmeridgian.

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Steiner, Timotheus Martin Christoph, Hans-Jürgen Gawlick, Frank Melcher e Felix Schlagintweit. "Ophiolite derived material as parent rocks for Late Jurassic bauxite: evidence for Tithonian unroofing in the Northern Calcareous Alps (Eastern Alps, Austria)". International Journal of Earth Sciences 110, n.º 5 (21 de maio de 2021): 1847–62. http://dx.doi.org/10.1007/s00531-021-02044-6.

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AbstractIn shallow-water limestones of the Plassen Formation in the Tirolic nappe of the Northern Calcareous Alps, bauxite was formed on karstified and tilted platform margin grainstones to boundstones around the ?Kimmeridgian/Tithonian boundary, or in the Early Tithonian as proven by Protopeneroplis striata Weynschenk, Labyrinthina mirabilis Weynschenk, and Salpingoporella pygmaea Gümbel. The platform established on top of the obducted ophiolite nappe stack. The onset of unroofing at the Kimmeridgian/Tithonian boundary exposed ophiolites to weathering, forming laterites, and bauxites. The weathered ophiolitic material was shed on the tilted, emerged, and karstified platform, where the bauxite accumulated. Continued subsidence led to flooding, and a Tithonian transgressive carbonate sequence sealed the bauxites. XRD analysis of the bauxite yields a composition of mainly boehmite with hematite and some berthierine, kaolinite, and chromite. SEM analysis verified magnetite, hematite, rutile, chromite, zircon, ferropseudobrookite, ilmenite, monazite, xenotime, and garnet distributed in pisoids and within the matrix. The pisoids reach a millimeter in size and partly show cores of older, larger pisoids. The composition of the chromites indicates an ophiolitic origin. Geochemical examination using major- and trace elements points to a mafic andesitic to basaltic parent material contaminated with highly fractionated rocks from an island arc. Formation of Early Tithonian bauxites in shallow-water limestones confirms Middle to Early Late Jurassic ophiolite obduction. This was followed by uplift and unroofing of the orogen from the Kimmeridgian/Tithonian boundary onwards after a period of relative tectonic quiescence with an onset of carbonate platforms during the Kimmeridgian on top of the nappe stack and the obducted Neo-Tethys ophiolites.

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Főzy, István, Nico Janssen e Gregory Price. "High-resolution ammonite, belemnite and stable isotope record from the most complete Upper Jurassic section of the Bakony Mts (Transdanubian Range, Hungary)". Geologica Carpathica 62, n.º 5 (1 de outubro de 2011): 413–33. http://dx.doi.org/10.2478/v10096-011-0030-y.

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High-resolution ammonite, belemnite and stable isotope record from the most complete Upper Jurassic section of the Bakony Mts (Transdanubian Range, Hungary)This research focuses on the cephalopod fauna and biostratigraphy of the latest Jurassic succession of the Lókút Hill (Bakony Mts, Transdanubia, Hungary). Fossils were collected bed-by-bed from Ammonitico Rosso facies and from the subsequent Biancone type rock. The poorly preserved cephalopods from the lowermost part of the profile, immediately above the radiolarite, may represent a part of the Oxfordian stage. The rich Kimmeridgian ammonite fauna is published for the first time while the formerly illustrated Tithonian fauna is revised. All the successive Kimmeridgian and Early Tithonian Mediterranean ammonite zones can be traced. The highest documented ammonite zone is the Late Tithonian Microcanthum Zone. The beds above yielded no cephalopods. Particular attention was paid to the belemnite fauna of over 120 specimens collected under strict ammonite control. Among the belemnite faunas an Early Tithonian, an early middle Tithonian, a late middle Tithonian, and a latest Tithonian assemblage can be distinguished. Thereby, an association is distinguished in the middle Late Kimmeridgian and one that characterizes the Oxfordian-Kimmeridgian boundary beds. The main difference from previously published belemnite data appears to be that the Hungarian assemblages are impoverished with respect to contemporary faunas from Italy and Spain (Mediterranean Province). An isotopic analysis of the belemnites show that the carbon-isotope data are consistent with carbon-isotope stratigraphies of the Western Tethys and show a decrease in values towards the Jurassic-Cretaceous boundary.

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Schweigert, Günter. "First records of Somalinautilus (Cephalopoda: Nautiloidea) from the Jurassic of Southern Germany – inferences for trans-provincial migrations". Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen 298, n.º 2 (1 de novembro de 2020): 137–46. http://dx.doi.org/10.1127/njgpa/2020/0939.

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The Late Jurassic nautiloid Somalinautilus antiquus (Dacqué, 1910), previously only known by the holotype from Lower Kimmeridgian strata of Ethiopia, is reported from the Lower Kimmeridgian (Platynota Zone) of Southern Germany. This unexpected record largely expands the known geographic distribution of this species. Another species of Somalinautilus, S. clavifer Tintant , 1994, is recorded for the first time from the Middle Jurassic (Lower Bathonian, Zigzag Zone) of Southern Germany. A short stratigraphic and palaeogeographic review of Somalinautilus occurrences is provided. Faunal migrations of nautiloids over large distances were probably triggered by sea- level highstands and/or palaeocurrents.

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Oates, Michael J. "Upper Kimmeridgian stratigraphy of Aylesbury, Buckinghamshire". Proceedings of the Geologists' Association 102, n.º 3 (janeiro de 1991): 185–99. http://dx.doi.org/10.1016/s0016-7878(08)80216-7.

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Valdes, Paul J., e Bruce W. Sellwood. "A palaeoclimate model for the Kimmeridgian". Palaeogeography, Palaeoclimatology, Palaeoecology 95, n.º 1-2 (agosto de 1992): 47–72. http://dx.doi.org/10.1016/0031-0182(92)90165-2.

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Matyja, Bronisław A., Andrzej Wierzbowski e John K. Wright. "The Sub-Boreal/Boreal ammonite succession at the Oxfordian/Kimmeridgian boundary at Flodigarry, Staffin Bay (Isle of Skye), Scotland". Transactions of the Royal Society of Edinburgh: Earth Sciences 96, n.º 4 (dezembro de 2005): 387–405. http://dx.doi.org/10.1017/s026359330000136x.

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ABSTRACTThis paper describes extensive new collections of ammonites made bed-by-bed across the Oxfordian/Kimmeridgian boundary sequence in the Flodigarry sections at Staffin Bay on the Isle of Skye. The ammonites belong to the Sub-Boreal family Aulacostephanidae and the Boreal family Cardioceratidae, enabling recognition of both the current standard Sub-Boreal and Boreal ammonite zonations. In consequence, it is possible to make a close correlation of these two zonal schemes through the interval studied in Skye. The research has provided new palaeontological data at levels of precision that justify the proposal of the section at Staffin as the site of a potential Global Boundary Stratotype Section and Point (GSSP) for the Oxfordian/Kimmeridgian boundary.The traditional Oxfordian/Kimmeridgian boundary placed at the Pseudocordata/Baylei zonal boundary of the Sub-Boreal zonal scheme corresponds precisely to the Rosenkrantzi/Bauhini zonal boundary of the Boreal zonal scheme. This level is characterised by the appearance of the first Pictonia (Pictonia flodigarriensis sp. nov.) together with first Prorasenia, replacing an older assemblage of Ringsteadia–Microbiplices (Sub-Boreal). It is also characterised by the first occurrence of small-sized Amoeboceras (Plasmatites) spp., as well as large Amoeboceras schulginae Mesezhnikov (Boreal). An alternative level that may be considered as a potential GSSP is the boundary between the Bauhini Zone and the Kitchini Zone of the Boreal zonal scheme, characterised by first occurrence of Amoeboceras (Amoebites) of the A. bayi group. This level corresponds to the Planula/Galar subzonal boundary of the Sub-Mediterranean zonal scheme, and lies close to the currently accepted Oxfordian/Kimmeridgian boundary in the Sub-Mediterranean Province.

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SAHA, RANITA, SHUBHABRATA PAUL, SUBHRONIL MONDAL, SUBHENDU BARDHAN, SHILADRI S. DAS, SANDIP SAHA e DEBATTAM SARKAR. "GASTROPOD DRILLING PREDATION IN THE UPPER JURASSIC OF KUTCH, INDIA". PALAIOS 36, n.º 9 (30 de setembro de 2021): 301–12. http://dx.doi.org/10.2110/palo.2020.072.

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ABSTRACT Gastropod drillholes on prey shells provide an opportunity to test the importance of predation in an evolutionary context. Although records of drilling predation are widespread across the Phanerozoic, the temporal distribution and relative importance of this mode of predation is still controversial. Further, some studies indicate a decline of drilling predation in the Mesozoic but other studies do not. In this study, we present a new dataset of gastropod drilling predation on Kimmeridgian and Tithonian bivalves of Kutch, India. Our study suggests that drilling was one of the prevailing modes of predation in the Upper Jurassic of Kutch with strongly variable intensities, ranging from 2% in the Kimmeridgian Seebachia to 26% in the Tithonian Pinna. A significant, albeit small, increase in drilling intensity from the Kimmeridgian to the Tithonian assemblages is associated with a change in relative sea-level and depositional environment. The morphology of drillholes and recent discovery of body fossils from the same stratigraphic units suggest naticid gastropods as the most likely drillers. A literature survey, along with previously collected specimen from the Jurassic of Kutch, reveals a more complex history of drilling predation than previously assumed.

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