Insights into the Cenozoic geology of North Beirut (harbour area): biostratigraphy, sedimentology and structural history
The biostratigraphy and sedimentology of the outcrops and bedrock recently exposed in archaeological excavations around the harbour area of Beirut (~5 km²) unlock the geological and structural history of that area, which in turn are key to understanding the hydrocarbon and hydrogeological potential...
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ftpubmed:oai:pubmedcentral.nih.gov:10171424 2023-06-11T04:16:08+02:00 Insights into the Cenozoic geology of North Beirut (harbour area): biostratigraphy, sedimentology and structural history Clark, Germaine Noujaim BouDagher-Fadel, Marcelle 2020-02-10 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10171424/ https://doi.org/10.14324/111.444/ucloe.000004 en eng UCL Press http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10171424/ http://dx.doi.org/10.14324/111.444/ucloe.000004 © 2020 The Authors. https://creativecommons.org/licenses/by/4.0/This is an open access article distributed under the terms of the Creative Commons Attribution Licence (CC BY) 4.0 (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution and reproduction in any medium, provided the original author and source are credited. UCL Open Environ Research Article Text 2020 ftpubmed https://doi.org/10.14324/111.444/ucloe.000004 2023-05-28T00:40:27Z The biostratigraphy and sedimentology of the outcrops and bedrock recently exposed in archaeological excavations around the harbour area of Beirut (~5 km²) unlock the geological and structural history of that area, which in turn are key to understanding the hydrocarbon and hydrogeological potential of the region. A key location (Site 2) of a studied outcrop section and newly uncovered bedrock is on the northern foothill cliff of East Beirut (Achrafieh). The outcrop section of carbonates is of Eocene beds overlain by conformable Miocene beds. The excavation of the slope bordering the outcrop uncovered a bedrock section of an early Pliocene shoreline of carbonate/siliciclastic sands at its base and topped by a beach-rock structure. The early Pliocene age of the shoreline section is dated by an assemblage of planktonic foraminifera that includes Sphaeroidinellopsis subdehiscens, Sphaeroidinella dehiscens and Orbulina universa. The Eocene carbonates of Site 2 extend the coverage of the previously reported Eocene outcrops in the harbour area. They form a parasequence of thin-bedded, chalky white limestones that includes the youngest fossil fish deposits in Lebanon (Bregmaceros filamentosus). The deposits are dated as early Priabonian by their association with the planktonic foraminiferal assemblage of Porticulasphaera tropicalis, Globigerinatheka barri, Dentoglobigerina venezuelana, Globigerina praebulloides, Turborotalia centralis and Borelis sp. The Middle Miocene carbonates that conformably overlie the early Priabonian, parasequence include a planktonic foraminiferal assemblage of Globigerinoides trilobus, Orbulina universa and Borelis melo. Elsewhere, in the harbour area, the preserved Eocene limestones are also overlain by conformable Miocene carbonate parasequences of Langhian–Serravallian age. Younger argillaceous limestone beds of the Mio/Pliocene age occur in the eastern central part of the harbour area and enclose an assemblage of Truncorotalia crassaformis, Globorotalia inflata and Orbulina universa. The ... Text Planktonic foraminifera PubMed Central (PMC) UCL Open Environment 2 |
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Research Article |
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Research Article Clark, Germaine Noujaim BouDagher-Fadel, Marcelle Insights into the Cenozoic geology of North Beirut (harbour area): biostratigraphy, sedimentology and structural history |
topic_facet |
Research Article |
description |
The biostratigraphy and sedimentology of the outcrops and bedrock recently exposed in archaeological excavations around the harbour area of Beirut (~5 km²) unlock the geological and structural history of that area, which in turn are key to understanding the hydrocarbon and hydrogeological potential of the region. A key location (Site 2) of a studied outcrop section and newly uncovered bedrock is on the northern foothill cliff of East Beirut (Achrafieh). The outcrop section of carbonates is of Eocene beds overlain by conformable Miocene beds. The excavation of the slope bordering the outcrop uncovered a bedrock section of an early Pliocene shoreline of carbonate/siliciclastic sands at its base and topped by a beach-rock structure. The early Pliocene age of the shoreline section is dated by an assemblage of planktonic foraminifera that includes Sphaeroidinellopsis subdehiscens, Sphaeroidinella dehiscens and Orbulina universa. The Eocene carbonates of Site 2 extend the coverage of the previously reported Eocene outcrops in the harbour area. They form a parasequence of thin-bedded, chalky white limestones that includes the youngest fossil fish deposits in Lebanon (Bregmaceros filamentosus). The deposits are dated as early Priabonian by their association with the planktonic foraminiferal assemblage of Porticulasphaera tropicalis, Globigerinatheka barri, Dentoglobigerina venezuelana, Globigerina praebulloides, Turborotalia centralis and Borelis sp. The Middle Miocene carbonates that conformably overlie the early Priabonian, parasequence include a planktonic foraminiferal assemblage of Globigerinoides trilobus, Orbulina universa and Borelis melo. Elsewhere, in the harbour area, the preserved Eocene limestones are also overlain by conformable Miocene carbonate parasequences of Langhian–Serravallian age. Younger argillaceous limestone beds of the Mio/Pliocene age occur in the eastern central part of the harbour area and enclose an assemblage of Truncorotalia crassaformis, Globorotalia inflata and Orbulina universa. The ... |
format |
Text |
author |
Clark, Germaine Noujaim BouDagher-Fadel, Marcelle |
author_facet |
Clark, Germaine Noujaim BouDagher-Fadel, Marcelle |
author_sort |
Clark, Germaine Noujaim |
title |
Insights into the Cenozoic geology of North Beirut (harbour area): biostratigraphy, sedimentology and structural history |
title_short |
Insights into the Cenozoic geology of North Beirut (harbour area): biostratigraphy, sedimentology and structural history |
title_full |
Insights into the Cenozoic geology of North Beirut (harbour area): biostratigraphy, sedimentology and structural history |
title_fullStr |
Insights into the Cenozoic geology of North Beirut (harbour area): biostratigraphy, sedimentology and structural history |
title_full_unstemmed |
Insights into the Cenozoic geology of North Beirut (harbour area): biostratigraphy, sedimentology and structural history |
title_sort |
insights into the cenozoic geology of north beirut (harbour area): biostratigraphy, sedimentology and structural history |
publisher |
UCL Press |
publishDate |
2020 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10171424/ https://doi.org/10.14324/111.444/ucloe.000004 |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_source |
UCL Open Environ |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10171424/ http://dx.doi.org/10.14324/111.444/ucloe.000004 |
op_rights |
© 2020 The Authors. https://creativecommons.org/licenses/by/4.0/This is an open access article distributed under the terms of the Creative Commons Attribution Licence (CC BY) 4.0 (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution and reproduction in any medium, provided the original author and source are credited. |
op_doi |
https://doi.org/10.14324/111.444/ucloe.000004 |
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UCL Open Environment |
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2 |
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1768373600965885952 |