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The maastrichtian-danian in the SW Zagros Fold-Thrust Belt(S. Iran):An Integration of Planktonic Foraminiferal Biostratigraphy and Gamma-Ray Spectrometry

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Acta Geologica Sinica(English Edition) 2020年第5期94卷 1339-1363页

作者： Abdolreza MOGHADDASI Hossein VAZIRI-MOGHADDAM Ali SEYRAFIAN Department of Geology Faculty of SciencesUniversity of IsfahanIsfahanIran

In this study, the maastrichtian-danian boundary was measured and sampled in two stratigraphic sections, the north and south flanks of the Dehnow anticline in Coastal Fars, Southern Iran. This boundary was also investigated in the drilled exploratory well-1 in the same region. The lithology of the maastrichtian-danian deposits consists of glauconitic, phosphatic argillaceous limestones and marlstones. 30 genera and 77 species of planktonic foraminifera have been determined. The recognized biozones are the Gansserina gansseri Interval Zone, and the Contusotruncana contusa Interval Zone, which indicates latest Campanian to middle maastrichtian age for the upper part of the Gurpi Formation. In addition, the Eoglobigerina edita(P1) Partial Range Zone, Praemurica uncinata(P2) Lowest Occurrence Zone, Morozovella angulata(P3) Lowest Occurrence Zone and Globanomalina psudomenardii(P4) Taxon Range Zone represent a danian to Thanetian age for the lower part of the Pabdeh Formation. From the absence of the Abathomphalus mayaroensis Interval Zone, Pseudoguembelina hariaensis Interval Zone, Pseudotextularia elegans Interval Zone, Plummerita hantkeninoides Interval Zone, Guembelitria cretacea(P0) Partial Range Zone and Parvularugoglobigerina eugubina(Pα) Total Range Zone, it can be deduced that there is a paraconformity across the maastrichtian–danian boundary in the studied area, this hiatus encompassing the late maastrichtian and the earliest danian. danian deposits from the study area contain reworked glauconitized macrofossils, planktonic and benthic foraminifera of the Cretaceous. The obtained surface gamma-ray spectrometry logs resemble the exploratory well-1 gamma-ray wireline log.

关键词： biostratigraphy planktonic foraminifera gamma-ray spectrometry maastrichtian-danian Zagros Iran

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THE maastrichtian-danian PALYNOLOGICAL ASSEMBLAGES FROM WUYUN OF JIAYIN NEARBY THE HEILONGJIANG (AMUR) RIVER

THE MAASTRICHTIAN-DANIAN PALYNOLOGICAL ASSEMBLAGES FROM WUYU...

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第二届国际古生物学大会

作者： Valentina S.MARKEVICH A.R.ASHRAF Eugenia V.BUGDAEVA Institute of Biology and Soil Sciences Far East Branch of Russian Academy of SciencesVladivostok 690022 Russia Institute of Geosciences University of Tuebingen Tuebingen D-72074 Germany

During the field research in 2002 and 2004, the deposits of Furao Formation and Wuyun Formation were studied. The palynological assemblages of the maastrichtian and danian ages were recognized from the above-mentioned beds nearby the Baishantou of Wuyun in Jiayin of Heilongjiang, China. The authors have made drilling work in these sediments and prepared the material from the bore hole for palynological research. The results of the research demonstrate that there are abundant and well-preserved fossil spores and pollen in the lower part of bore hole. Among them the diversity of ferns are great (14 species), represented by spores of Schizaeaceae, Gleicheniaceae, Cyatheaceae,

关键词： maastrichtian-danian palynological assemblages K-T boundary Wuyun of Jiayin Heilongjiang (Amur) River

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埃及西南沙漠Bir Abu Minqar马斯特里赫特—丹尼期沉积中的水椰果实化石(英文)

埃及西南沙漠Bir Abu Minqar马斯特里赫特—丹尼期沉积中的水椰果...

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中国古生物学会第十次全国会员代表大会暨第25届学术年会——纪念中国古生物学会成立80周年

作者： Maher I.EL-SOUGHIER R.C.MEHROTRA 周志炎史恭乐 State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and PalaeontologyChinese Academy of Sciences South Valley University Aswan Faculty of ScienceGeology Department Nanjing Institute of Geology and Palaeontology Chinese Academy of Sciences

Fossil fruits and seeds of Nypa burtinii of Arecaceae are described from the maastrichtian and danian sediments of the Dakhla Formation of Bir Abu Minqar,South Western Desert,*** fruits become one of the oldest fossil records of the genus Nypa,corresponding to those known from the Deccan Intertrappean beds of India in *** Nypa is now the inhabitant along the sea coast from Sri Lanka to North Australia and New Guinea,

关键词： Nypa burtinii maastrichtian-danian South Western Desert Egypt palaeoecolgy palaeogeography

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