Early Jurassic benthic foraminiferal ecology from the Central High Atlas Mountains, Morocco

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  • University of Texas at Austin
  • Aarhus University
  • Universite Moulay Ismail
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OriginalspracheEnglisch
Seiten (von - bis)277-299
Seitenumfang23
FachzeitschriftPALAIOS
Jahrgang39
Ausgabenummer8
Frühes Online-Datum20 Aug. 2024
PublikationsstatusVeröffentlicht - 31 Aug. 2024
Extern publiziertJa

Abstract

The Central High Atlas Mountains of Morocco have an extensive record of Lower Jurassic deposits from the Tethyan Ocean. In the Amellago region, Ziz Valley, and Dadès Valley several fossilized reef outcrops preserve benthic foraminifera spanning the Pliensbachian and Toarcian stages. This study analyzes benthic foraminiferal assemblage changes across the bi-phased extinctions at the Pliensbachian/Toarcian boundary and the Jenkyns Event (also referred to as the Toarcian Oceanic Anoxic Event). In Pliensbachian samples, assemblages with abundant Glomospira sp., Glomospirella sp., Siphovalvulina sp., Haurania deserta, Placopsilina sp., Mesoendothyra sp., and Everticyclammina praevirguliana are observed. Following both the Pliensbachian/Toarcian boundary event and the Jenkyns Event, benthic foraminiferal density, evenness, and species richness decreased, indicating these communities underwent ecologic stress; however, loss of diversity was most substantial between samples that pre-date and post-date the Jenkyns Event. Whereas the Pliensbachian/Toarcian boundary event coincides with the demise of the large benthic foraminifera Mesoendothyra sp. and Everticyclammina praevirguliana, the Jenkyns Event was detrimental for most clades of benthic foraminifera, including many small, resilient taxa. Based on the evidence provided, we suggest that the Pliensbachian/Toarcian boundary and the Jenkyns Event were distinct events, potentially caused by distinct environmental perturbations.

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Early Jurassic benthic foraminiferal ecology from the Central High Atlas Mountains, Morocco. / Fonville, Tanner; Martindale, Rowan C.; Stone, Travis N. et al.
in: PALAIOS, Jahrgang 39, Nr. 8, 31.08.2024, S. 277-299.

Publikation: Beitrag in FachzeitschriftArtikelForschungPeer-Review

Fonville, T, Martindale, RC, Stone, TN, Septfontaine, M, Bodin, S, Krencker, FN & Kabiri, L 2024, 'Early Jurassic benthic foraminiferal ecology from the Central High Atlas Mountains, Morocco', PALAIOS, Jg. 39, Nr. 8, S. 277-299. https://doi.org/10.2110/palo.2023.026
Fonville, T., Martindale, R. C., Stone, T. N., Septfontaine, M., Bodin, S., Krencker, F. N., & Kabiri, L. (2024). Early Jurassic benthic foraminiferal ecology from the Central High Atlas Mountains, Morocco. PALAIOS, 39(8), 277-299. https://doi.org/10.2110/palo.2023.026
Fonville T, Martindale RC, Stone TN, Septfontaine M, Bodin S, Krencker FN et al. Early Jurassic benthic foraminiferal ecology from the Central High Atlas Mountains, Morocco. PALAIOS. 2024 Aug 31;39(8):277-299. Epub 2024 Aug 20. doi: 10.2110/palo.2023.026
Fonville, Tanner ; Martindale, Rowan C. ; Stone, Travis N. et al. / Early Jurassic benthic foraminiferal ecology from the Central High Atlas Mountains, Morocco. in: PALAIOS. 2024 ; Jahrgang 39, Nr. 8. S. 277-299.
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abstract = "The Central High Atlas Mountains of Morocco have an extensive record of Lower Jurassic deposits from the Tethyan Ocean. In the Amellago region, Ziz Valley, and Dad{\`e}s Valley several fossilized reef outcrops preserve benthic foraminifera spanning the Pliensbachian and Toarcian stages. This study analyzes benthic foraminiferal assemblage changes across the bi-phased extinctions at the Pliensbachian/Toarcian boundary and the Jenkyns Event (also referred to as the Toarcian Oceanic Anoxic Event). In Pliensbachian samples, assemblages with abundant Glomospira sp., Glomospirella sp., Siphovalvulina sp., Haurania deserta, Placopsilina sp., Mesoendothyra sp., and Everticyclammina praevirguliana are observed. Following both the Pliensbachian/Toarcian boundary event and the Jenkyns Event, benthic foraminiferal density, evenness, and species richness decreased, indicating these communities underwent ecologic stress; however, loss of diversity was most substantial between samples that pre-date and post-date the Jenkyns Event. Whereas the Pliensbachian/Toarcian boundary event coincides with the demise of the large benthic foraminifera Mesoendothyra sp. and Everticyclammina praevirguliana, the Jenkyns Event was detrimental for most clades of benthic foraminifera, including many small, resilient taxa. Based on the evidence provided, we suggest that the Pliensbachian/Toarcian boundary and the Jenkyns Event were distinct events, potentially caused by distinct environmental perturbations.",
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T1 - Early Jurassic benthic foraminiferal ecology from the Central High Atlas Mountains, Morocco

AU - Fonville, Tanner

AU - Martindale, Rowan C.

AU - Stone, Travis N.

AU - Septfontaine, Michel

AU - Bodin, Stephane

AU - Krencker, François Nicolas

AU - Kabiri, Lahcen

N1 - Publisher Copyright: Copyright © 2024, SEPM (Society for Sedimentary Geology)

PY - 2024/8/31

Y1 - 2024/8/31

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AB - The Central High Atlas Mountains of Morocco have an extensive record of Lower Jurassic deposits from the Tethyan Ocean. In the Amellago region, Ziz Valley, and Dadès Valley several fossilized reef outcrops preserve benthic foraminifera spanning the Pliensbachian and Toarcian stages. This study analyzes benthic foraminiferal assemblage changes across the bi-phased extinctions at the Pliensbachian/Toarcian boundary and the Jenkyns Event (also referred to as the Toarcian Oceanic Anoxic Event). In Pliensbachian samples, assemblages with abundant Glomospira sp., Glomospirella sp., Siphovalvulina sp., Haurania deserta, Placopsilina sp., Mesoendothyra sp., and Everticyclammina praevirguliana are observed. Following both the Pliensbachian/Toarcian boundary event and the Jenkyns Event, benthic foraminiferal density, evenness, and species richness decreased, indicating these communities underwent ecologic stress; however, loss of diversity was most substantial between samples that pre-date and post-date the Jenkyns Event. Whereas the Pliensbachian/Toarcian boundary event coincides with the demise of the large benthic foraminifera Mesoendothyra sp. and Everticyclammina praevirguliana, the Jenkyns Event was detrimental for most clades of benthic foraminifera, including many small, resilient taxa. Based on the evidence provided, we suggest that the Pliensbachian/Toarcian boundary and the Jenkyns Event were distinct events, potentially caused by distinct environmental perturbations.

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