نتایج جستجو برای: chattian

تعداد نتایج: 52  

2017
Mathias Harzhauser Gudrun Daxner-Höck Margarita A. Erbajeva Paloma López-Guerrero Olivier Maridet Adriana Oliver Werner E. Piller Ursula B. Göhlich Reinhard Ziegler

The Taatsiin Gol Basin in Mongolia is a key area for understanding the evolution and dispersal of Central Asian mammal faunas during the Oligocene and early Miocene. After two decades of intense fieldwork, the area is extraordinarily well sampled and taxonomically well studied, yielding a large dataset of 19,042 specimens from 60 samples. The specimens represent 176 species-level and 99 genus-l...

Journal: :Antarctic Science 2021

Abstract King George Island (South Shetland Islands, Antarctic Peninsula) is renowned for its terrestrial palaeoenvironmental record, which includes evidence potentially up to four Cenozoic glacial periods. An advantage of the glacigenic outcrops on island that they are associated with volcanic formations can be isotopically dated. As a result new mapping and chronological study, it now shown p...

Journal: :Revue de Micropaléontologie 2021

This work introduces one of the first palynostatigraphic study conducted on formations from Eocene and overlying lowermost Miocene successions (Cunga Quifangondo formations) exposed in Onshore Kwanza Basin, Angola. To improve Cunga age, new biostratigraphic correlations palaeoenvironmental interpretations based qualitative quantitative analyses organic walled dinoflagellate cysts sedimentary ro...

2014
Gaurav Srivastava R.C. Mehrotra

BACKGROUND The family Phyllanthaceae has a predominantly pantropical distribution. Of its several genera, Bridelia Willd. is of a special interest because it has disjunct equally distributed species in Africa and tropical Asia i.e. 18-20 species in Africa-Madagascar (all endemic) and 18 species in tropical Asia (some shared with Australia). On the basis of molecular phylogenetic study on Bridel...

Journal: :geopersia 2014
mahnaz karevan hosein vaziri-moghaddam asadollah mahboubi reza moussavi-harami

in this research, biostratigraphy and paleo-ecological reconstruction of the qom formation deposits in bijegan village, northeast ofdelijan, are discussed. the studied section is situated in the western margin of the urumieh-dokhtar magmatic arc (the intra-arc basin).the qom formation deposits at the studied area are rupelian-chattian in age. larger benthic foraminifers are used for biostratigr...

Journal: :Annales De Paleontologie 2021

L’étude de la biodiversité corallienne série sédimentaire l’Oligocène supérieur (Lower Coralline Limestone, Chattien) Malte a permis d’identifier 25 genres scléractiniaires représentés par 41 espèces. Trois nouvelles espèces sont proposées : Miophora naxxarensis n. sp. , Nerthastraea maltensis sp.et Gyrosmilia Les observations réalisées dans divers sites oligocènes Malte, surtout aux environs N...

Journal: :Ornis Hungarica 2023

Abstract The authors describe a fossil avian distal tibiotarsal epiphysis, remains of cormorant (Phalacrociracinae), differing in age and morphological characters from other cormorants. material comes sandy marine deposits the village Máriahalom north-western Hungary, together with 26 vertebrate species, mostly marine. fossiliferous deposit is established Late Oligocene, at beginning Chattian s...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه اصفهان - دانشکده علوم 1389

this research concentrates on the lithostratigraphy, biostratigraphy, microfacies and sedimentary environment of the asmari and gachsaran formations at southwest firuzabad. the thickness of the studied section in all 608.95 meters that 220.8 meters belong to the asmari formation and 387.95 meters belong to the gachsaran formation (champe and mol members). in the study area, the asmari formation...

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