Upper Eocene planktonic foraminifera from northern Saudi Arabia: implications for stratigraphic ranges
The Rashrashiyah Formation of the Sirhan Basin in northern Saudi Arabia contains diverse assemblages of planktonic foraminifera. We examined the biostratigraphy, stratigraphic range and preservation of upper Eocene planktonic foraminifera. Assemblages are well-preserved and diverse, with 40 species...
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ftdoajarticles:oai:doaj.org/article:887e7f9ecffa4b4f9676ad441ddeea72 2023-05-15T18:00:06+02:00 Upper Eocene planktonic foraminifera from northern Saudi Arabia: implications for stratigraphic ranges B. S. Wade M. H. Aljahdali Y. A. Mufrreh A. M. Memesh S. A. AlSoubhi I. S. Zalmout 2021-09-01T00:00:00Z https://doi.org/10.5194/jm-40-145-2021 https://doaj.org/article/887e7f9ecffa4b4f9676ad441ddeea72 EN eng Copernicus Publications https://jm.copernicus.org/articles/40/145/2021/jm-40-145-2021.pdf https://doaj.org/toc/0262-821X https://doaj.org/toc/2041-4978 doi:10.5194/jm-40-145-2021 0262-821X 2041-4978 https://doaj.org/article/887e7f9ecffa4b4f9676ad441ddeea72 Journal of Micropalaeontology, Vol 40, Pp 145-161 (2021) Geology QE1-996.5 article 2021 ftdoajarticles https://doi.org/10.5194/jm-40-145-2021 2022-12-31T12:17:26Z The Rashrashiyah Formation of the Sirhan Basin in northern Saudi Arabia contains diverse assemblages of planktonic foraminifera. We examined the biostratigraphy, stratigraphic range and preservation of upper Eocene planktonic foraminifera. Assemblages are well-preserved and diverse, with 40 species and 11 genera. All samples are assigned to the Priabonian Globigerinatheka semiinvoluta Highest Occurrence Zone (E14), consistent with calcareous nannofossil biostratigraphy indicating Zone CNE17. Well-preserved planktonic foraminifera assemblages from the lower part of the upper Eocene are rare worldwide. Our study provides new insights into the stratigraphic ranges of many species. We find older (Zone E14) stratigraphic occurrences of several species of Globoturborotalita previously thought to have evolved in the latest Eocene (Zone E15, E16) or Oligocene; these include G. barbula, G. cancellata, G. gnaucki, G. pseudopraebulloides , and G. paracancellata . Older stratigraphic occurrences for Dentoglobigerina taci and Subbotina projecta are also found, and Globigerinatheka kugleri occurs at a younger stratigraphic level than previously proposed. Our revisions to stratigraphic ranges indicate that the late Eocene had a higher tropical–subtropical diversity of planktonic foraminifera than hitherto reported. Article in Journal/Newspaper Planktonic foraminifera Directory of Open Access Journals: DOAJ Articles Journal of Micropalaeontology 40 2 145 161 |
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Directory of Open Access Journals: DOAJ Articles |
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Geology QE1-996.5 |
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Geology QE1-996.5 B. S. Wade M. H. Aljahdali Y. A. Mufrreh A. M. Memesh S. A. AlSoubhi I. S. Zalmout Upper Eocene planktonic foraminifera from northern Saudi Arabia: implications for stratigraphic ranges |
topic_facet |
Geology QE1-996.5 |
description |
The Rashrashiyah Formation of the Sirhan Basin in northern Saudi Arabia contains diverse assemblages of planktonic foraminifera. We examined the biostratigraphy, stratigraphic range and preservation of upper Eocene planktonic foraminifera. Assemblages are well-preserved and diverse, with 40 species and 11 genera. All samples are assigned to the Priabonian Globigerinatheka semiinvoluta Highest Occurrence Zone (E14), consistent with calcareous nannofossil biostratigraphy indicating Zone CNE17. Well-preserved planktonic foraminifera assemblages from the lower part of the upper Eocene are rare worldwide. Our study provides new insights into the stratigraphic ranges of many species. We find older (Zone E14) stratigraphic occurrences of several species of Globoturborotalita previously thought to have evolved in the latest Eocene (Zone E15, E16) or Oligocene; these include G. barbula, G. cancellata, G. gnaucki, G. pseudopraebulloides , and G. paracancellata . Older stratigraphic occurrences for Dentoglobigerina taci and Subbotina projecta are also found, and Globigerinatheka kugleri occurs at a younger stratigraphic level than previously proposed. Our revisions to stratigraphic ranges indicate that the late Eocene had a higher tropical–subtropical diversity of planktonic foraminifera than hitherto reported. |
format |
Article in Journal/Newspaper |
author |
B. S. Wade M. H. Aljahdali Y. A. Mufrreh A. M. Memesh S. A. AlSoubhi I. S. Zalmout |
author_facet |
B. S. Wade M. H. Aljahdali Y. A. Mufrreh A. M. Memesh S. A. AlSoubhi I. S. Zalmout |
author_sort |
B. S. Wade |
title |
Upper Eocene planktonic foraminifera from northern Saudi Arabia: implications for stratigraphic ranges |
title_short |
Upper Eocene planktonic foraminifera from northern Saudi Arabia: implications for stratigraphic ranges |
title_full |
Upper Eocene planktonic foraminifera from northern Saudi Arabia: implications for stratigraphic ranges |
title_fullStr |
Upper Eocene planktonic foraminifera from northern Saudi Arabia: implications for stratigraphic ranges |
title_full_unstemmed |
Upper Eocene planktonic foraminifera from northern Saudi Arabia: implications for stratigraphic ranges |
title_sort |
upper eocene planktonic foraminifera from northern saudi arabia: implications for stratigraphic ranges |
publisher |
Copernicus Publications |
publishDate |
2021 |
url |
https://doi.org/10.5194/jm-40-145-2021 https://doaj.org/article/887e7f9ecffa4b4f9676ad441ddeea72 |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_source |
Journal of Micropalaeontology, Vol 40, Pp 145-161 (2021) |
op_relation |
https://jm.copernicus.org/articles/40/145/2021/jm-40-145-2021.pdf https://doaj.org/toc/0262-821X https://doaj.org/toc/2041-4978 doi:10.5194/jm-40-145-2021 0262-821X 2041-4978 https://doaj.org/article/887e7f9ecffa4b4f9676ad441ddeea72 |
op_doi |
https://doi.org/10.5194/jm-40-145-2021 |
container_title |
Journal of Micropalaeontology |
container_volume |
40 |
container_issue |
2 |
container_start_page |
145 |
op_container_end_page |
161 |
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1766169057481981952 |