Megalodon, mako shark and planktonic foraminifera from the continental shelf off Portugal and their age
Turbidite fragments collected by a fishing net off the central Portuguese coast (Peniche) present some fossils. The matrix is phosphatized and iron-rich with small quantities of manganese, zinc and copper. The occurrence of Megaselachus megalodon most probably excludes an age older than Middle Mioce...
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Universitat de Barcelona (UB), Geociències Barcelona (Geo3BCN), Institut de Diagnosi Ambiental i Estudis de l'Aigua (IDAEA), Universitat Autònoma de Barcelona (UAB)
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ftdoajarticles:oai:doaj.org/article:9a925ec9c4d34aa89a50618cd7638803 2023-11-12T04:24:45+01:00 Megalodon, mako shark and planktonic foraminifera from the continental shelf off Portugal and their age M.T. ANTUNES P. LEGOINHA A. BALBINO 2015-07-01T00:00:00Z https://doaj.org/article/9a925ec9c4d34aa89a50618cd7638803 EN eng Universitat de Barcelona (UB), Geociències Barcelona (Geo3BCN), Institut de Diagnosi Ambiental i Estudis de l'Aigua (IDAEA), Universitat Autònoma de Barcelona (UAB) https://revistes.ub.edu/index.php/GEOACTA/article/view/10581 https://doaj.org/toc/1696-5728 1696-5728 https://doaj.org/article/9a925ec9c4d34aa89a50618cd7638803 Geologica Acta, Vol 13, Iss 3 (2015) Megalodont Mako shark Planktic foraminifera Continental shelf Age Science Q Geology QE1-996.5 article 2015 ftdoajarticles 2023-10-22T00:36:06Z Turbidite fragments collected by a fishing net off the central Portuguese coast (Peniche) present some fossils. The matrix is phosphatized and iron-rich with small quantities of manganese, zinc and copper. The occurrence of Megaselachus megalodon most probably excludes an age older than Middle Miocene. Its very advanced evolution stage is consistent with a Pliocene age. Based on planktonic foraminifera in depressions of cetacean skulls recovered in the same way, from the same area, the age of sharks and cetaceans is likely to range from latest Messinian to Early Pliocene. Condensed sedimentation is revealed by the co-occurrence of typical Late Pliocene and Quaternary foraminifera. Lack of benthic foraminifera suggests more or less deep environments, while a scallop, Mimachlamys varia, indicates nearby rocky substrate. The mako shark Isurus cf. oxyrhinchus is recorded in the area for the first time. The shark association represents a moderately warm environment as M. megalodon and Isurus are essentially temperate water dwellers, while no warm water form is known. Early Pliocene planktonic foraminifera point out to temperate to subtropical waters. Hence temperate to moderately warm conditions seem to have prevailed. Article in Journal/Newspaper Planktonic foraminifera Directory of Open Access Journals: DOAJ Articles |
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Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Megalodont Mako shark Planktic foraminifera Continental shelf Age Science Q Geology QE1-996.5 |
spellingShingle |
Megalodont Mako shark Planktic foraminifera Continental shelf Age Science Q Geology QE1-996.5 M.T. ANTUNES P. LEGOINHA A. BALBINO Megalodon, mako shark and planktonic foraminifera from the continental shelf off Portugal and their age |
topic_facet |
Megalodont Mako shark Planktic foraminifera Continental shelf Age Science Q Geology QE1-996.5 |
description |
Turbidite fragments collected by a fishing net off the central Portuguese coast (Peniche) present some fossils. The matrix is phosphatized and iron-rich with small quantities of manganese, zinc and copper. The occurrence of Megaselachus megalodon most probably excludes an age older than Middle Miocene. Its very advanced evolution stage is consistent with a Pliocene age. Based on planktonic foraminifera in depressions of cetacean skulls recovered in the same way, from the same area, the age of sharks and cetaceans is likely to range from latest Messinian to Early Pliocene. Condensed sedimentation is revealed by the co-occurrence of typical Late Pliocene and Quaternary foraminifera. Lack of benthic foraminifera suggests more or less deep environments, while a scallop, Mimachlamys varia, indicates nearby rocky substrate. The mako shark Isurus cf. oxyrhinchus is recorded in the area for the first time. The shark association represents a moderately warm environment as M. megalodon and Isurus are essentially temperate water dwellers, while no warm water form is known. Early Pliocene planktonic foraminifera point out to temperate to subtropical waters. Hence temperate to moderately warm conditions seem to have prevailed. |
format |
Article in Journal/Newspaper |
author |
M.T. ANTUNES P. LEGOINHA A. BALBINO |
author_facet |
M.T. ANTUNES P. LEGOINHA A. BALBINO |
author_sort |
M.T. ANTUNES |
title |
Megalodon, mako shark and planktonic foraminifera from the continental shelf off Portugal and their age |
title_short |
Megalodon, mako shark and planktonic foraminifera from the continental shelf off Portugal and their age |
title_full |
Megalodon, mako shark and planktonic foraminifera from the continental shelf off Portugal and their age |
title_fullStr |
Megalodon, mako shark and planktonic foraminifera from the continental shelf off Portugal and their age |
title_full_unstemmed |
Megalodon, mako shark and planktonic foraminifera from the continental shelf off Portugal and their age |
title_sort |
megalodon, mako shark and planktonic foraminifera from the continental shelf off portugal and their age |
publisher |
Universitat de Barcelona (UB), Geociències Barcelona (Geo3BCN), Institut de Diagnosi Ambiental i Estudis de l'Aigua (IDAEA), Universitat Autònoma de Barcelona (UAB) |
publishDate |
2015 |
url |
https://doaj.org/article/9a925ec9c4d34aa89a50618cd7638803 |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_source |
Geologica Acta, Vol 13, Iss 3 (2015) |
op_relation |
https://revistes.ub.edu/index.php/GEOACTA/article/view/10581 https://doaj.org/toc/1696-5728 1696-5728 https://doaj.org/article/9a925ec9c4d34aa89a50618cd7638803 |
_version_ |
1782339234699411456 |