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首页> 外文期刊>Stratigraphy >Planktonic foraminiferal biostratigraphy from the sedimentary cover of Troodos Massif, Northern Cyprus:Remarks on Aquitanian-Langhian biozonation
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Planktonic foraminiferal biostratigraphy from the sedimentary cover of Troodos Massif, Northern Cyprus:Remarks on Aquitanian-Langhian biozonation

机译：北塞浦路斯特罗多斯地块沉积盖层的浮游有孔虫生物地层学：关于阿基坦-朗吉安生物带的评论

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摘要

A rich planktonic foraminiferal assemblage including two new species, Globorotalia sinuososuturalis n. sp. and Paragloborotalia lefkaraensis n. sp., have been recorded in the uppermost part of the sedimentary cover of Troodos Massif, exposed in Northern Cyprus. The continuity of chalk and marl deposits throughout the Aquitanian-Langhian time interval, with an abundant and well diversified assemblage, has provided to establish a detailed biostratigraphic framework which can be generally comparable with the recent standard and regional zonations. The mabioevents defining the zonal boundaries are the LOs of Paragloborotalia kugleri and Catapsydrax dissimilis, the FOs of Globigerinoides bisphericus, Praeorbulina sicana, Praeorbulina glomerosa curva, Praeorbulina glomerosa glomerosa and Orbulina suturalis. Quantitative planktonic foraminiferal analyses performed on two studied sections have allowed to determine several secondary bioevents for the latest Aquitanian-early Burdigalian time interval. They are in stratigraphical order, the FOs of Globigerinoides altiaperturus and Globigerinoides trilobus, the LO of Globigerinoides primordius, the FOs of Paragloborotalia acrostoma and Globigerinoides subquadratus, the LO of Globoquadrina praedehiscens and finally the FO of Globigerinella praesiphonifera. On the basis of the biostratigraphic and quantitative data, it has been concluded that the FO of Globigerinoides subquadratus, within the Globigerinoides altiaperturus/Catapsydrax dissimilis Zone spanning a long interval in the Mediterranean region, may be a correlative bioevent. Therefore, Globigerinoides subquadratus/Catapsydrax dissimilis Concurrent Range Zone has been proposed for the upper part of this zonal interval in order to improve the biostratigraphic resolution of the Burdigalian. Furthermore, the evolutionary lineage of genus Praeorbulina, which ranges from Praeorbulina sicana to Orbulina suturalis via Praeorbulina glomerosa subspecies, has been recog-nized in the studied sequence. Thus, Langhian interval has been subdivided into Praeorbulina sicana Zone, Praeorbulina glomerosa curva Subzone, Praeorbulina glomerosa glomerosa Subzone and Orbulina suturalis Zone.
机译：丰富的浮游有孔虫组合，包括两个新种，Globorotalia sinuososuturalis。 sp。和副球茎lefkaraensis。记录在北塞浦路斯的Troodos Massif沉积覆盖的最上部。在整个阿基坦-朗吉时间间隔内，白垩和泥灰岩沉积物的连续性，以及丰富而多样的组合，为建立详细的生物地层学框架提供了条件，该框架通常可与近期的标准和区域划分相媲美。定义地带边界的主要生物事件是副球果的LO和双胞胎的LO，Globigerinoides bisphericus，Praeorbulina sicana，Praeorbulina glomerosa curva，Praeorbulina glomerosa glomerosa和Orbulina suturalis的FO。在两个研究部分进行的定量浮游有孔虫分析已确定了最近的阿基坦时期-布尔迪加利时期的时间间隔中的几个次生生物事件。它们按地层顺序排列，分别是globigerinoides altiaperturus和globigerinoides trilobus的FO，globigerinoides primordius的LO，paragloborotalia acrostoma和globigerinoides subquadratus的FO，globoquadrina praedehiscens的fo。根据生物地​​层学和定量数据，可以得出结论，在地中海地区跨越很长一段时间的Globigerinoides altiaperturus / Catapsydrax dissimilis区域内的Globigerinoides subquadratus的FO可能是相关的生物事件。因此，已为该带状层段的上部提出了Globigerinoides subquadratus / disapalisydrax dissimilis并发带区，以提高Burdigalian的生物地层分辨率。此外，在研究的序列中已经认识到Praeorbulina属的进化谱系，从spracanorbulina sicana到subulalis suturalis经由Praerorbulina glomerosa亚种。因此，Langhian间隔又分为Praeorbulina sicana区，Praerorbulina glomerosa curva亚区，Praerorinaina glomerosa glomerosa亚区和Orbulina suturalis区。

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