Biostratigraphy and palaeoenvironments of the Eocene deep-water deposits of the Tarcau Nappe (Eastern Carpathians, Romania) based on agglutinated foraminifera and calcareous nannofossil assemblages

被引：0
作者：
Bindiu-Haitonic, Raluca [1 ,2 ]
Niculici, Sabina [3 ]
Filipescu, Sorin [1 ,2 ]
Balc, Ramona [4 ,5 ]
Aroldi, Carlo [1 ,2 ]
机构：
[1] Babes Bolyai Univ, Fac Biol & Geol, Dept Geol, 1 Mihail Kogalniceanu St, Cluj Napoca 400084, Romania
[2] Ctr Integrated Geol Studies, 1 Mihail Kogalniceanu St, Cluj Napoca 400084, Romania
[3] Depomures SA, Tamas Erno St 1, Targu Mures 540307, Mures, Romania
[4] Babes Bolyai Univ, Fac Environm Sci & Engn, 30 Fantanele St, Cluj Napoca 400294, Romania
[5] Babes Bolyai Univ, Interdisciplinary Res Inst Bionano Sci, Treboniu Laurian 42, Cluj Napoca 400271, Romania
来源：
PROCEEDINGS OF THE NINTH INTERNATIONAL WORKSHOP ON AGGLUTINATED FORAMINIFERA | 2017年 / 22卷
基金：
欧盟地平线“2020”;
关键词：
PALEOCENE/EOCENE THERMAL MAXIMUM; BENTHIC FORAMINIFERA; ATLANTIC; SEA; VARIABILITY; CLIMATE;
D O I：
暂无
中图分类号：
P5 [地质学];
学科分类号：
0709 ; 081803 ;
摘要：
The micropalaeontological and sedimentological study of two representative sections from the Tarcau Nappe (Brusturosu stream, External Flysch of the Eastern Carpathians, Romania) provides new biostratigraphical and palaeoenvironmental data on the Eocene deposits. In both sections the foraminiferal assemblages are dominated by agglutinated taxa (Bathysiphon sp., Nothia spp., Ammodiscus spp., Paratrochamminoides spp., Reophax spp., Reticulophragmium spp. etc.); the calcareous benthic taxa are rare, represented by Laevidentalina and Stilostomella. Except for the M3b morphogroup (flattened irregular forms), all agglutinated foraminifera morphogroups were identified in the studied samples. The assemblages are composed of deep-water agglutinated foraminifera species which belong to the "Flysch-Type Biofacies" characteristic of a bathyal palaeoenvironment. Based on the presence of the calcareous nannofossils Chiasmolithus grandis, Isthmolithus recurvus, Chiasmolithus oamaruensis and Reticulofenestra reticulata as well as the foraminiferal species Psamminopelta gradsteini, Reticulophragmium amplectens and Saccamminoides carpathicus, the age of the deposits is assigned to the Bartonian (the BR-1 section) and the Priabonian (the BR-2 section).
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页码：17 / 38
页数：22
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