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Vasja Mikuž - One of the best experts on this subject based on the ideXlab platform.
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ostanek ustnace labridae iz spodnjemiocenskih plasti klanca nad dobrno the remain of wrasse labridae from early Miocene klanc beds above dobrna
Folia biologica et geologica, 2015Co-Authors: Ales Soster, Vasja MikužAbstract:V prispevku so obravnavani žrelni zobci miocenske ustnace s Klanca nad Dobrno. Med prevladujocimi ostanki zobovja hrustancnic je ugotovljenih tudi nekaj ostankov kostnic. Vecina ostankov kostnic pripada predstavnikom družine Sparidae, le ena najdba manjsi ustnaci iz družine Labridae, ki je predstavljena v prispevku. Pripada vrsti Labrodon pavimentatum Gervais, 1857. Kljucne besede: riba, ustnaca (Labridae), spodnji miocen, Klanc nad Dobrno This paper is discussing pharyngeal teeth of Miocene wrasse found near Klanc above Dobrna. Among the prevailing shark teeth, we also identified a few remains belonging to family Sparidae and one single specimen belonging to smaller wrasse of the Labridae family, which is presented in this paper and determined s Labrodon pavimentatum Gervais, 1857. Key words: fish, wrasse (Labridae), Early Miocene, Klanc above Dobrna, Slo venia
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Ostanek ustnače (Labridae) iz spodnjemiocenskih plasti Klanca nad Dobrno / The remain of wrasse (Labridae) from Early Miocene Klanc beds above Dobrna
2015Co-Authors: Ales Soster, Vasja MikužAbstract:V prispevku so obravnavani žrelni zobci miocenske ustnace s Klanca nad Dobrno. Med prevladujocimi ostanki zobovja hrustancnic je ugotovljenih tudi nekaj ostankov kostnic. Vecina ostankov kostnic pripada predstavnikom družine Sparidae, le ena najdba manjsi ustnaci iz družine Labridae, ki je predstavljena v prispevku. Pripada vrsti Labrodon pavimentatum Gervais, 1857. Kljucne besede: riba, ustnaca (Labridae), spodnji miocen, Klanc nad Dobrno This paper is discussing pharyngeal teeth of Miocene wrasse found near Klanc above Dobrna. Among the prevailing shark teeth, we also identified a few remains belonging to family Sparidae and one single specimen belonging to smaller wrasse of the Labridae family, which is presented in this paper and determined s Labrodon pavimentatum Gervais, 1857. Key words: fish, wrasse (Labridae), Early Miocene, Klanc above Dobrna, Slo venia
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Morski volk (Megaselachus megalodon) najden tudi pri Orehovici na Dolenjskem / A mackerel shark (Megaselachus megalodon) find in Orehovica, Dolenjska, Slovenia
2013Co-Authors: Vasja Mikuž, Ales SosterAbstract:V prispevku je obravnavan razmeroma skromen ostanek zoba manjsega primerka miocenskega morskega volka najdenega v Orehovici na Dolenjskem, ki pripada vrsti Megaselachus megalodon (Agassiz, 1835). Zobje tovrstnega najvecjega morskega psa vseh casov so v Sloveniji precej redki, vse dosedanje najdbe so iz miocenskih plasti. Kljucne besede: morski volk, Megaselachus, srednji miocen, badenij, Centralna Paratetida, Orehovica, Dolenjska, Slovenija The paper discusses a relatively modest remain of a shark tooth, belonging to a small specimen of the Miocene species Megaselachus megalodon (Agassiz, 1835), which was found in Orehovica in Dolenjska. Fossil teeth of the largest shark species of all times are relatively rare in Slovenia, all of them were found in sediments of Miocene age. Key words: mackerel shark, Megaselachus , Middle Miocene, Badenian, Central Paratethys, Orehovica, Dolenjska, Slovenia
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kamena jedra mehkužcev iz miocenskih plasti pri beli cerkvi na dolenjskem mollusc internal casts from the Miocene beds near bela cerkev slovenia
Folia biologica et geologica, 2013Co-Authors: Vasja MikužAbstract:Raziskovana in obravnavana so kamena jedra miocenskih mehkužcev, ki so najdena v preperini laporastih in koralinacejskih apnencev na njivi blizu zaselka Bela Cerkev na Dolenjskem. Prevladujejo kamena jedra skoljk, ki so obicajno ohranjena v celoti. Veliko manj in slabse ohranjenih je polžjih kamenih jeder. Ugotovljene oblike skoljk in polžev so badenijske starosti. Kljucne besede : kamena jedra, mehkužci - polži, skoljke, srednji miocen, badenij, Centralna Paratetida, Bela Cerkev, Slovenija We present a study of Miocene mollusc internal casts found in the weathered marls and corallinacean limestones in a field near Bela Cerkev in Dolenjska. Among the internal casts, bivalves are most abundant, complete specimens are common. Gastropod internal casts are much less abundant and poorly preserved. The determined specimens are of Badenian age. Key words: internal casts, Mollusc - Gastropods, Bivalves, Middle Miocene, Badenian, Central Paratethys, Bela Cerkev, Slovenia
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vretence iz miocenskih plasti tunjiskega gricevja vertebra from the Miocene beds of tunjisko gricevje slovenia
Folia biologica et geologica, 2012Co-Authors: Vasja Mikuž, Davorin PreisingerAbstract:The vertebra in question was found in lower Miocene beds west of Kamnik in Tunjisko gricevje, central Slovenia. The locality is situated in calcareous conglomerates of the Govce Formation. The vertebra belongs to an adult aquatic mammal, most probably of Odontocetes group. We attributed it among the caudal vertebrae, i.e. of caudal spinal domain of the dolphins. Key words: vertebra, whales, mammals, Miocene, Central Paratethys, Tunjisko gricevje, Slovenia Obravnavano vretence je najdeno v spodnjemiocenskih plasteh zahodno od Kamnika v Tunjiskem gricevju v osrednji Sloveniji. Najdisce je v apnencevih konglomeratih govske formacije. Vretence pripada odraslemu vodnemu sesalcu, najverjetneje iz skupine zobatih kitov (Odontoceti). Uvrstili smo ga med repna vretenca oziroma v kavdalno hrbtenicno obmocje delfina ali pliskavke. Kljucne besede: vretence, kiti, sesalci, miocen, Centralna Paratetida, Tunjisko gricevje, Slovenija
Ales Soster - One of the best experts on this subject based on the ideXlab platform.
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ostanek ustnace labridae iz spodnjemiocenskih plasti klanca nad dobrno the remain of wrasse labridae from early Miocene klanc beds above dobrna
Folia biologica et geologica, 2015Co-Authors: Ales Soster, Vasja MikužAbstract:V prispevku so obravnavani žrelni zobci miocenske ustnace s Klanca nad Dobrno. Med prevladujocimi ostanki zobovja hrustancnic je ugotovljenih tudi nekaj ostankov kostnic. Vecina ostankov kostnic pripada predstavnikom družine Sparidae, le ena najdba manjsi ustnaci iz družine Labridae, ki je predstavljena v prispevku. Pripada vrsti Labrodon pavimentatum Gervais, 1857. Kljucne besede: riba, ustnaca (Labridae), spodnji miocen, Klanc nad Dobrno This paper is discussing pharyngeal teeth of Miocene wrasse found near Klanc above Dobrna. Among the prevailing shark teeth, we also identified a few remains belonging to family Sparidae and one single specimen belonging to smaller wrasse of the Labridae family, which is presented in this paper and determined s Labrodon pavimentatum Gervais, 1857. Key words: fish, wrasse (Labridae), Early Miocene, Klanc above Dobrna, Slo venia
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Ostanek ustnače (Labridae) iz spodnjemiocenskih plasti Klanca nad Dobrno / The remain of wrasse (Labridae) from Early Miocene Klanc beds above Dobrna
2015Co-Authors: Ales Soster, Vasja MikužAbstract:V prispevku so obravnavani žrelni zobci miocenske ustnace s Klanca nad Dobrno. Med prevladujocimi ostanki zobovja hrustancnic je ugotovljenih tudi nekaj ostankov kostnic. Vecina ostankov kostnic pripada predstavnikom družine Sparidae, le ena najdba manjsi ustnaci iz družine Labridae, ki je predstavljena v prispevku. Pripada vrsti Labrodon pavimentatum Gervais, 1857. Kljucne besede: riba, ustnaca (Labridae), spodnji miocen, Klanc nad Dobrno This paper is discussing pharyngeal teeth of Miocene wrasse found near Klanc above Dobrna. Among the prevailing shark teeth, we also identified a few remains belonging to family Sparidae and one single specimen belonging to smaller wrasse of the Labridae family, which is presented in this paper and determined s Labrodon pavimentatum Gervais, 1857. Key words: fish, wrasse (Labridae), Early Miocene, Klanc above Dobrna, Slo venia
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Morski volk (Megaselachus megalodon) najden tudi pri Orehovici na Dolenjskem / A mackerel shark (Megaselachus megalodon) find in Orehovica, Dolenjska, Slovenia
2013Co-Authors: Vasja Mikuž, Ales SosterAbstract:V prispevku je obravnavan razmeroma skromen ostanek zoba manjsega primerka miocenskega morskega volka najdenega v Orehovici na Dolenjskem, ki pripada vrsti Megaselachus megalodon (Agassiz, 1835). Zobje tovrstnega najvecjega morskega psa vseh casov so v Sloveniji precej redki, vse dosedanje najdbe so iz miocenskih plasti. Kljucne besede: morski volk, Megaselachus, srednji miocen, badenij, Centralna Paratetida, Orehovica, Dolenjska, Slovenija The paper discusses a relatively modest remain of a shark tooth, belonging to a small specimen of the Miocene species Megaselachus megalodon (Agassiz, 1835), which was found in Orehovica in Dolenjska. Fossil teeth of the largest shark species of all times are relatively rare in Slovenia, all of them were found in sediments of Miocene age. Key words: mackerel shark, Megaselachus , Middle Miocene, Badenian, Central Paratethys, Orehovica, Dolenjska, Slovenia
Ulises Hernández Romano - One of the best experts on this subject based on the ideXlab platform.
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Sequence stratigraphy of the Miocene section, southern Gulf of Mexico
Marine and Petroleum Geology, 2017Co-Authors: Hilda Clarisa Gutiérrez Paredes, Octavian Catuneanu, Ulises Hernández RomanoAbstract:Abstract This study focuses on the interpretation of stratigraphic sequences through the integration of biostratigraphic, well log and 3D seismic data. Sequence analysis is used to identify significant surfaces, systems tracts, and sequences for the Miocene succession. The depositional systems in this area are dominantly represented by submarine fans deposited on the slope and the basin floor. The main depositional elements that characterize these depositional settings are channel systems (channel-fills, channel-levee systems), frontal splays, frontal splay complexes, lobes of debrites and mass-transport complexes. Five genetic sequences were identified and eleven stratigraphic surfaces interpreted and correlated through the study area. The Oligocene-lower Miocene, lower Miocene and middle Miocene sequences were deposited in bathyal water depths, whereas the upper Miocene sequences (Tortonian and Messinian) were deposited in bathyal and outer neritic water depths. The bulk of the Miocene succession, from the older to younger deposits consists of mass-transport deposits (Oligocene-lower Miocene); mass transport deposits and turbidite deposits (lower Miocene); debrite deposits and turbidite deposits (middle Miocene); and debrite deposits, turbidite deposits and pelagic and hemipelagic sediments (upper Miocene). Cycles of sedimentation are delineated by regionally extensive maximum flooding surfaces within condensed sections of hemipelagic mudstone which represent starved basin floors. These condensed sections are markers for regional correlation, and the maximum flooding surfaces, which they include, are the key surfaces for the construction of the Miocene stratigraphic framework. The falling-stage system tract forms the bulk of the Miocene sequences. Individual sequence geometry and thickness were controlled largely by salt evacuation and large-scale sedimentation patterns. For the upper Miocene, the older sequence (Tortonian) includes sandy deposits, whereas the overlying younger sequence (Messinian) includes sandy facies at the base and muddy facies at the top; this trend reflects the change from slope to shelf settings.
Chunxia Zhang - One of the best experts on this subject based on the ideXlab platform.
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clay mineral assemblages in the zhaotong basin of southwestern china implications for the late Miocene and pliocene evolution of the south asian monsoon
Palaeogeography Palaeoclimatology Palaeoecology, 2019Co-Authors: Chunxia Zhang, Zhengtang Guo, Chenglong Deng, Nina G Jablonski, Rixiang ZhuAbstract:Abstract The characteristics of the evolution of the South Asian monsoon during the late Miocene through the Pliocene are highly debated. To obtain a better understanding, we studied the clay mineral assemblages and the clay fraction content of a high-quality sedimentary sequence (borehole core ZK1) spanning the interval of 8.8–2.62 Ma in the Zhaotong Basin, southwestern Yunnan Province, on the southeastern margin of the Tibetan Plateau. Smectite, kaolinite, illite and vermiculite were the four main clay minerals identified, and changes in their relative abundance reveal a distinct pattern of climate change during the study interval. Until the very late Miocene kaolinite and smectite, with a small amount of illite, were dominant, suggesting a relatively warm and humid climate; from ~6.2 to ~2.8 Ma smectite was dominant, with a minor amount of kaolinite and illite, indicating a relatively cool and humid climate; and from ~2.8 to 2.62 Ma vermiculite (HIV) and illite were dominant, with a minor amount of kaolinite, indicating a relatively cold and humid climate. The variation in clay mineral assemblages indicate substantial changes in the South Asian monsoon in the Zhaotong Basin that promoted a change from a warm and humid climate in the late Micoene to cool and humid climate in the very late Miocene through Pliocene, followed by a gradual trend towards a cold and humid climate in the very late Pliocene. Comparison with records from elsewhere indicates that the observed variations in the South Asian monsoon were mainly controlled by global cooling rather than by Tibetan Plateau uplift.
Masayasu Kato - One of the best experts on this subject based on the ideXlab platform.
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Geochemical secular variation of magma source during Early to Middle Miocene time in the Niigata area, NE Japan: Asthenospheric mantle upwelling during back-arc basin opening
Lithos, 2005Co-Authors: Kenji Shuto, Hiroyuki Ishimoto, Yuka Hirahara, Makoto Sato, Koji Matsui, Norie Fujibayashi, Eiichi Takazawa, Kaori Yabuki, Masamichi Sekine, Masayasu KatoAbstract:Abstract In the Niigata region of the NE Japan arc, basaltic and intermediate to felsic volcanic rocks (silicic andesite, dacite and rhyolite) have been produced during the Early Miocene, Middle Miocene and Pliocene ages, spanning the pre-Japan Sea opening to post-opening stages. Early Miocene basaltic rocks are characterized by enriched Sr and Nd isotopic signatures (initial 87Sr / 86Sr (SrI) = 0.70557 to 0.70592 and initial 143Nd / 144Nd (NdI) = 0.51255 to 0.51262), whereas Middle Miocene and Pliocene basaltic rocks are slightly enriched than MORB in terms of SrI (0.70314–0.70416) and NdI (0.51286–0.51310). Early Miocene basaltic rocks are also characterized by higher abundances of HFSE and LREE, and higher Zr / Y compared to Middle Miocene and Pliocene basaltic rocks. The geochemical features of Early Miocene basaltic rocks are almost identical to those of basaltic rocks found in continental rift zones, such as the Rio Grande rift. The different geochemical signatures of Early and Middle Miocene basaltic rocks can be ascribed to the geochemical differences in the mantle source. Apart from andesitic rocks of the Kakuda area, most of Early and Middle Miocene intermediate to felsic volcanic rocks from the Niigata region show significantly higher SrI values (0.70673–0.70773) and lower NdI values (0.51234–0.51254) than Early Miocene basaltic rocks, indicating a lower crustal origin for these more felsic volcanic rocks. A possible tectono-magmatic model for the production of post-Early Miocene volcanic rocks from the Niigata region includes: (1) at the Early Miocene (22–20 Ma); commencement of asthenospheric mantle upwelling followed by both partial melting of the overlying lithospheric mantle and crustal rifting, resulting in the production of continental rift zone-type basaltic magmas which have either erupted on the surface or initiated partial melting of the lower crust to produce more felsic magmas, and (2) at the Middle Miocene (after 15 Ma); thinning of the overlying lithosphere due to the opening of the Japan Sea. This was associated with asthenospheric upwelling followed by partial melting of the asthenosphere to generate extensive basaltic magmas. These were either erupted or melted the lower crust to generate more felsic magmas. Such tectono-magmatic processes may also be applicable to the generation of Early to Middle Miocene basaltic to felsic volcanic rocks in many other parts of the back-arc margin of the NE Japan arc.
