Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.2113/gsjfr.44.3.203 |
ORTHOPHRAGMINIDS (FORAMINIFERA) ACROSS THE PALEOCENE-EOCENE TRANSITION FROM NORTH AFRICA: TAXONOMY, BIOSTRATIGRAPHY, AND PALEOBIOGEOGRAPHIC IMPLICATIONS | |
Ozcan, Ercan1; Scheibner, Christian2; Boukhalfa, Kamel3 | |
通讯作者 | Ozcan, Ercan |
来源期刊 | JOURNAL OF FORAMINIFERAL RESEARCH
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ISSN | 0096-1191 |
出版年 | 2014 |
卷号 | 44期号:3页码:203-229 |
英文摘要 | The platform margin and slope deposits in Gala la, Egypt, record a larger benthic foraminiferal turnover (LFT), previously proposed to coincide with the Paleocene-Eocene (PIE) boundary based on the negative carbon isotope excursion (CIE) consistent with the Paleocene-Eocene Thermal Maximum (PETM). The LFT in these deposits was established on the basis of supposed synchronous first appearances of such taxa as Alveolina, Nummulites, and Orbitolites at or around the PIE boundary, although the response of orthophragminids, assigned only to the genus Discocyclina, was not studied. The orthophragminids in the late Paleocene-early Eocene interval in some of these deposits (sections B3; D5, D6, and D8) are represented by species of Discocyclina Umbel, Orbitoclypeus Silvestri, and Nemkovella Less, reported for the first time from the southern margin of the Tethys. The Thanetian orthophragminids consist of Orbitoclypeus multiplicatus, O. schopeni, Discocyclina seunesi, and D. tenuis, while assemblages in the early Eocene are characterized by Discocyclina archiaci, D. dispansa, Orbitoclypeus schopeni, and Nemkovella stockari, suggesting a significant change in composition through the sections. The assemblages below and above the PIE boundary, only recorded in sections B3 and D8, mark the orthophragminid zones OZ 1B and 3, respectively. The OZ 2, correlated to shallow benthic zones SBZ 5 and 6 in the basal part of the Eocene and recognized by the first appearance of asterocyclinids, nemkovellids, and some ribbed orbitoclypeid species in northern Tethyan platforms, was not found. This may suggest either a hiatus, recorded previously in section D8 based on calcareous plankton; across the PIE transition in section B3 or an artifact of sampling. Consequently, our data raise some doubts about the aforementioned compositional changes related to the LFT and P/E boundary. We discovered an advanced developmental stage of N. stockari (N. stockari bejaensis n. subsp.) from a new section in Tunisia. This subspecies seems to be a key taxon for the early Eocene of the southern Tethyan platforms and extends the geographic and stratigraphic range of the species. We conclude that orthophragminids at Galala bear a close resemblance to those in the northern Tethyan platforms, especially assemblages from Turkey. |
类型 | Article |
语种 | 英语 |
国家 | Turkey ; Germany ; Tunisia |
收录类别 | SCI-E |
WOS记录号 | WOS:000339932700001 |
WOS关键词 | HAYMANA-POLATLI BASIN ; LARGER FORAMINIFERA ; THERMAL MAXIMUM ; WESTERN TETHYS ; EASTERN DESERT ; NW TURKEY ; EVOLUTION ; EGYPT ; ORBITOCLYPEUS ; PLATFORM |
WOS类目 | Paleontology |
WOS研究方向 | Paleontology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/183301 |
作者单位 | 1.Istanbul Tech Univ, Fac Mines, Dept Geol Engn, TR-34469 Istanbul, Turkey; 2.Univ Bremen, D-28334 Bremen, Germany; 3.Univ Gabes, Fac Sci Gabes, Zirig 6072, Gabes, Tunisia |
推荐引用方式 GB/T 7714 | Ozcan, Ercan,Scheibner, Christian,Boukhalfa, Kamel. ORTHOPHRAGMINIDS (FORAMINIFERA) ACROSS THE PALEOCENE-EOCENE TRANSITION FROM NORTH AFRICA: TAXONOMY, BIOSTRATIGRAPHY, AND PALEOBIOGEOGRAPHIC IMPLICATIONS[J],2014,44(3):203-229. |
APA | Ozcan, Ercan,Scheibner, Christian,&Boukhalfa, Kamel.(2014).ORTHOPHRAGMINIDS (FORAMINIFERA) ACROSS THE PALEOCENE-EOCENE TRANSITION FROM NORTH AFRICA: TAXONOMY, BIOSTRATIGRAPHY, AND PALEOBIOGEOGRAPHIC IMPLICATIONS.JOURNAL OF FORAMINIFERAL RESEARCH,44(3),203-229. |
MLA | Ozcan, Ercan,et al."ORTHOPHRAGMINIDS (FORAMINIFERA) ACROSS THE PALEOCENE-EOCENE TRANSITION FROM NORTH AFRICA: TAXONOMY, BIOSTRATIGRAPHY, AND PALEOBIOGEOGRAPHIC IMPLICATIONS".JOURNAL OF FORAMINIFERAL RESEARCH 44.3(2014):203-229. |
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