A preliminary investigation of Eocene larger benthic foraminifera assemblages from Alpine and molasse-type deposits of the Hellenic peninsula (Greece)

IF 0.7 Q4 PALEONTOLOGY

REVUE DE MICROPALEONTOLOGIE Pub Date : 2021-04-01 DOI:10.1016/j.revmic.2020.100468

Vasiliki-Grigoria Dimou , Olga Koukousioura , Margarita D. Dimiza , Maria V. Triantaphyllou , György Less , Fotini Pomoni-Papaioannou , Georgios Syrides

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引用次数: 2

Abstract

Larger Benthic Foraminifera (LBF) from five localities in Greece were studied in order to define the morphological features of various nummulitid forms and to describe the foraminiferal assemblages in different geotectonic environments. The selected sites belong to molasse-type formations in Kirki/Thrace Basin and Vasiliki Trikala/Mesohellenic Trough, and carbonate deposits in Alpine Pindos, Ionian and Tripolis geotectonic units.

Taxonomic studies combined with biometric data, when possible, enabled us to identify different morphotypes. In the molasse-type deposits of Thrace Basin (Kirki Thrace), N. perforatus was found along with N. maximus and Assilina exponens suggesting correlation with biozone SBZ 16/17, while in the Mesohellenic Trough deposits (Vasiliki Trikala) the association included N. perforatus group, Operculina gomezi group and Silvestriella tetraedra, indicating a Bartonian age, SBZ 17-18A. In outcrops found within Pindos unit (Perivoli Grevena) three different assemblages have been observed in the microbreccious olistholiths, suggesting three distinguished deposits forming quasi-continuous succession spanning from early to middle and up to late Eocene. The Ionian unit (Manoliasa Ioannina) presented a mixed redeposited fauna including late Eocene, early Paleogene and planktonic foraminifera clasts. Finally, the Tripolis unit (Dervenakia and Tripolis) association was interpreted as Bartonian in age, defined by the presence of Operculina gomezi group and N. perforatus group.

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希腊半岛阿尔卑斯和糖蜜型沉积物始新世大型底栖有孔虫组合的初步调查

本文对希腊5个地区的大型底栖有孔虫(large Benthic Foraminifera, LBF)进行了研究，以确定其各种数量多的形态特征，并描述其在不同大地构造环境下的有孔虫组合。选择的地点属于Kirki/Thrace盆地和Vasiliki Trikala/中希腊海槽的糖蜜型地层，以及Alpine Pindos、Ionian和Tripolis大地构造单元的碳酸盐矿床。在可能的情况下，分类学研究结合生物特征数据使我们能够识别不同的形态。在色雷斯盆地(Kirki Thrace)的蜜蜜型矿床中，N. perforatus与N. maximus和Assilina指数相结合，表明其与SBZ 16/17生物带有关;在中希腊海槽(Vasiliki Trikala)矿床中，N. perforatus群、Operculina gomez群和Silvestriella tetraedra相结合，表明其属于巴氏期(SBZ 17-18A)。在Pindos单元(Perivoli Grevena)的露头中，在微角砾岩中观察到三种不同的组合，表明三个不同的矿床形成了早至中、晚始新世的准连续演替。伊奥尼亚单元(Manoliasa Ioannina)是一个由始新世晚期、古近世早期和浮游有孔虫碎屑组成的混合再沉积动物群。最后，Tripolis组(Dervenakia和Tripolis)组合在年龄上被解释为Bartonian，由Operculina gomzi组和N. perforatus组的存在来定义。

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来源期刊

REVUE DE MICROPALEONTOLOGIE PALEONTOLOGY-

CiteScore

2.50

自引率

0.00%

发文量

期刊介绍： La Revue de micropaléontologie publie 4 fois par an des articles de intérêt international, consacrés à tous les aspects de la micropaléontologie. Les textes, en anglais ou en français, sont des articles originaux, des résultats de recherche, des synthèses et mises au point, des comptes rendus de réunions scientifiques et des analyses de ouvrages. La revue se veut résolument ouverte à tous les aspects de la micropaléontologie en accueillant des travaux traitant de la systématique des microfossiles (et de leurs équivalents actuels), des bactéries aux microrestes de vertébrés, et de toutes leurs applications en sciences biologiques et géologiques.