High-frequency explosive volcanic eruptions in a late jurassic volcanic arc the ameghino formation, Antarctic Peninsula
Ash layers in the Lower Tithonian Longing Member (Ameghino Formation) on the Antarctic Peninsula are derived from the fallout of tephra associated with explosive eruptions. These layers are preserved in a complete and continuous sedimentary record formed in a deep, anoxic marine environment, with hi...
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ftunibueairesbd:paper:paper_15271404_v71_n1_p101_Scasso 2023-05-15T13:51:24+02:00 High-frequency explosive volcanic eruptions in a late jurassic volcanic arc the ameghino formation, Antarctic Peninsula Scasso, Roberto Adrian 2001 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15271404_v71_n1_p101_Scasso https://hdl.handle.net/20.500.12110/paper_15271404_v71_n1_p101_Scasso unknown https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15271404_v71_n1_p101_Scasso http://hdl.handle.net/20.500.12110/paper_15271404_v71_n1_p101_Scasso explosive volcanism island arc Jurassic tephra volcanic eruption Antarctica 2001 ftunibueairesbd https://doi.org/20.500.12110/paper_15271404_v71_n1_p101_Scasso 2023-02-16T02:06:32Z Ash layers in the Lower Tithonian Longing Member (Ameghino Formation) on the Antarctic Peninsula are derived from the fallout of tephra associated with explosive eruptions. These layers are preserved in a complete and continuous sedimentary record formed in a deep, anoxic marine environment, with high background sedimentation rates allowing rapid burial and preservation. Absence of bioturbation precluded the thin ash beds from mixing with enclosing sediment. The average interval between explosive eruptions in the volcanic arc of the Antarctic Peninsula during the Early Tithonian is estimated at between 700 and 1000 years, the highest frequency of explosive volcanic events ever defined in ancient marine rocks. This frequency is comparable to that of explosive eruptions in some presently active volcanic arcs. This indicates that deposition in some deep marine settings can produce records sufficiently complete to determine accurate frequencies of explosive eruptions in ancient magmatic arcs. The apparent lull in the volcanic activity in the Antarctic Peninsula during this time,: inferred from dating of volcanic rocks from the arc itself, is not supported by the marze record in the adjacent basin and must be due to a bias of sampling. Copyright © 2001, SEPM Society for Sedimentary Geology. Fil:Scasso, R.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Other/Unknown Material Antarc* Antarctic Antarctic Peninsula Antarctica Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires) Antarctic Antarctic Peninsula Argentina The Antarctic |
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Open Polar |
collection |
Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires) |
op_collection_id |
ftunibueairesbd |
language |
unknown |
topic |
explosive volcanism island arc Jurassic tephra volcanic eruption Antarctica |
spellingShingle |
explosive volcanism island arc Jurassic tephra volcanic eruption Antarctica Scasso, Roberto Adrian High-frequency explosive volcanic eruptions in a late jurassic volcanic arc the ameghino formation, Antarctic Peninsula |
topic_facet |
explosive volcanism island arc Jurassic tephra volcanic eruption Antarctica |
description |
Ash layers in the Lower Tithonian Longing Member (Ameghino Formation) on the Antarctic Peninsula are derived from the fallout of tephra associated with explosive eruptions. These layers are preserved in a complete and continuous sedimentary record formed in a deep, anoxic marine environment, with high background sedimentation rates allowing rapid burial and preservation. Absence of bioturbation precluded the thin ash beds from mixing with enclosing sediment. The average interval between explosive eruptions in the volcanic arc of the Antarctic Peninsula during the Early Tithonian is estimated at between 700 and 1000 years, the highest frequency of explosive volcanic events ever defined in ancient marine rocks. This frequency is comparable to that of explosive eruptions in some presently active volcanic arcs. This indicates that deposition in some deep marine settings can produce records sufficiently complete to determine accurate frequencies of explosive eruptions in ancient magmatic arcs. The apparent lull in the volcanic activity in the Antarctic Peninsula during this time,: inferred from dating of volcanic rocks from the arc itself, is not supported by the marze record in the adjacent basin and must be due to a bias of sampling. Copyright © 2001, SEPM Society for Sedimentary Geology. Fil:Scasso, R.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. |
author |
Scasso, Roberto Adrian |
author_facet |
Scasso, Roberto Adrian |
author_sort |
Scasso, Roberto Adrian |
title |
High-frequency explosive volcanic eruptions in a late jurassic volcanic arc the ameghino formation, Antarctic Peninsula |
title_short |
High-frequency explosive volcanic eruptions in a late jurassic volcanic arc the ameghino formation, Antarctic Peninsula |
title_full |
High-frequency explosive volcanic eruptions in a late jurassic volcanic arc the ameghino formation, Antarctic Peninsula |
title_fullStr |
High-frequency explosive volcanic eruptions in a late jurassic volcanic arc the ameghino formation, Antarctic Peninsula |
title_full_unstemmed |
High-frequency explosive volcanic eruptions in a late jurassic volcanic arc the ameghino formation, Antarctic Peninsula |
title_sort |
high-frequency explosive volcanic eruptions in a late jurassic volcanic arc the ameghino formation, antarctic peninsula |
publishDate |
2001 |
url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15271404_v71_n1_p101_Scasso https://hdl.handle.net/20.500.12110/paper_15271404_v71_n1_p101_Scasso |
geographic |
Antarctic Antarctic Peninsula Argentina The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula Argentina The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica |
op_relation |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_15271404_v71_n1_p101_Scasso http://hdl.handle.net/20.500.12110/paper_15271404_v71_n1_p101_Scasso |
op_doi |
https://doi.org/20.500.12110/paper_15271404_v71_n1_p101_Scasso |
_version_ |
1766255245341491200 |