The Paleogeographic Evolution of the Orthophragminids of the Paleogene
Orthophragminids are larger benthic foraminifera (LBF) and, together with the nummulitids, were the major rock-forming foraminifera from the middle Paleocene to the late Eocene. Today, porous, LBF-bearing, Paleogene limestones, which occur globally from the Pacific and Atlantic margins of the Americ...
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Cushman Foundation for Foraminiferal Research
2017
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ftucl:oai:eprints.ucl.ac.uk.OAI2:10038590 2023-12-24T10:24:22+01:00 The Paleogeographic Evolution of the Orthophragminids of the Paleogene Boudagher-Fadel, MK Price, GD 2017-10 text https://discovery.ucl.ac.uk/id/eprint/10038590/8/Boudagher-Fadel_2398%20BouDagher-Fadel%20and%20Price-text.pdf https://discovery.ucl.ac.uk/id/eprint/10038590/15/Boudagher-Fadel_Figures_combined.pdf https://discovery.ucl.ac.uk/id/eprint/10038590/ eng eng Cushman Foundation for Foraminiferal Research https://discovery.ucl.ac.uk/id/eprint/10038590/8/Boudagher-Fadel_2398%20BouDagher-Fadel%20and%20Price-text.pdf https://discovery.ucl.ac.uk/id/eprint/10038590/15/Boudagher-Fadel_Figures_combined.pdf https://discovery.ucl.ac.uk/id/eprint/10038590/ open Journal of Foraminiferal Research , 47 (4) pp. 337-357. (2017) Article 2017 ftucl 2023-11-27T13:07:30Z Orthophragminids are larger benthic foraminifera (LBF) and, together with the nummulitids, were the major rock-forming foraminifera from the middle Paleocene to the late Eocene. Today, porous, LBF-bearing, Paleogene limestones, which occur globally from the Pacific and Atlantic margins of the Americas to the Indo-Pacific, form potentially valuable oil reservoirs, and their biota have formed the basis of the definition of three paleobiogeographic provinces, namely those of the Americas, Tethys, and the Indo-Pacific. The orthophragminids of the western part of the Tethyan Province have been studied extensively, however, the other provinces are less well characterized, and until now the origin and paleogeographic development of this group have not been fully articulated. New material described here allows the clear definition of a fourth, South African paleobiogeographic province, and, when combined with refined biostratigraphic dating based on new material from the Americas, Europe, South Asia and SE Asia, enables their paleogeographic and biostratigraphic evolution to be determined. Critically, the occurrence of cosmopolitan planktonic foraminifera (PF) within LBF assemblages enables the first occurrences of various LBF forms within each province to be dated relative to well-calibrated planktonic zones (PZ). From this, we infer that, like the previously studied lepidocyclinids and nummulitids, the orthophragminids originated in the Americas during the Paleocene, probably between the late Danian (PZ P1c, 63.5 Ma) and the early Selandian (PZ P3a, 61.6 Ma). By the middle Paleocene, the orthophragminids had migrated across the Atlantic to the previously isolated West African coast at the extreme of Tethys, probably during global sea-level low stands at 60.3 Ma and again at 56.4 Ma. Subsequently, the American Province again became isolated. In the Tethys, the orthophragminid migrations followed two paths: northeastward through the Tethyan corridor in the late Paleo-cene (Thanetian), and south in the earliest Eocene ... Article in Journal/Newspaper Planktonic foraminifera University College London: UCL Discovery Pacific |
institution |
Open Polar |
collection |
University College London: UCL Discovery |
op_collection_id |
ftucl |
language |
English |
description |
Orthophragminids are larger benthic foraminifera (LBF) and, together with the nummulitids, were the major rock-forming foraminifera from the middle Paleocene to the late Eocene. Today, porous, LBF-bearing, Paleogene limestones, which occur globally from the Pacific and Atlantic margins of the Americas to the Indo-Pacific, form potentially valuable oil reservoirs, and their biota have formed the basis of the definition of three paleobiogeographic provinces, namely those of the Americas, Tethys, and the Indo-Pacific. The orthophragminids of the western part of the Tethyan Province have been studied extensively, however, the other provinces are less well characterized, and until now the origin and paleogeographic development of this group have not been fully articulated. New material described here allows the clear definition of a fourth, South African paleobiogeographic province, and, when combined with refined biostratigraphic dating based on new material from the Americas, Europe, South Asia and SE Asia, enables their paleogeographic and biostratigraphic evolution to be determined. Critically, the occurrence of cosmopolitan planktonic foraminifera (PF) within LBF assemblages enables the first occurrences of various LBF forms within each province to be dated relative to well-calibrated planktonic zones (PZ). From this, we infer that, like the previously studied lepidocyclinids and nummulitids, the orthophragminids originated in the Americas during the Paleocene, probably between the late Danian (PZ P1c, 63.5 Ma) and the early Selandian (PZ P3a, 61.6 Ma). By the middle Paleocene, the orthophragminids had migrated across the Atlantic to the previously isolated West African coast at the extreme of Tethys, probably during global sea-level low stands at 60.3 Ma and again at 56.4 Ma. Subsequently, the American Province again became isolated. In the Tethys, the orthophragminid migrations followed two paths: northeastward through the Tethyan corridor in the late Paleo-cene (Thanetian), and south in the earliest Eocene ... |
format |
Article in Journal/Newspaper |
author |
Boudagher-Fadel, MK Price, GD |
spellingShingle |
Boudagher-Fadel, MK Price, GD The Paleogeographic Evolution of the Orthophragminids of the Paleogene |
author_facet |
Boudagher-Fadel, MK Price, GD |
author_sort |
Boudagher-Fadel, MK |
title |
The Paleogeographic Evolution of the Orthophragminids of the Paleogene |
title_short |
The Paleogeographic Evolution of the Orthophragminids of the Paleogene |
title_full |
The Paleogeographic Evolution of the Orthophragminids of the Paleogene |
title_fullStr |
The Paleogeographic Evolution of the Orthophragminids of the Paleogene |
title_full_unstemmed |
The Paleogeographic Evolution of the Orthophragminids of the Paleogene |
title_sort |
paleogeographic evolution of the orthophragminids of the paleogene |
publisher |
Cushman Foundation for Foraminiferal Research |
publishDate |
2017 |
url |
https://discovery.ucl.ac.uk/id/eprint/10038590/8/Boudagher-Fadel_2398%20BouDagher-Fadel%20and%20Price-text.pdf https://discovery.ucl.ac.uk/id/eprint/10038590/15/Boudagher-Fadel_Figures_combined.pdf https://discovery.ucl.ac.uk/id/eprint/10038590/ |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_source |
Journal of Foraminiferal Research , 47 (4) pp. 337-357. (2017) |
op_relation |
https://discovery.ucl.ac.uk/id/eprint/10038590/8/Boudagher-Fadel_2398%20BouDagher-Fadel%20and%20Price-text.pdf https://discovery.ucl.ac.uk/id/eprint/10038590/15/Boudagher-Fadel_Figures_combined.pdf https://discovery.ucl.ac.uk/id/eprint/10038590/ |
op_rights |
open |
_version_ |
1786199054194049024 |