Intraformational unconformities as a record of late Miocene eustatic falls of sea level in the Pisco Formation (southern Peru)
Field mapping and sedimentological study of outcrop sections exposed along the Ica River valley permitted the establishment of a regional allostratigraphic framework for the upper Miocene portion of the Pisco Formation. The stratigraphy of the studied interval is illustrated using a new 1:20,000-sca...
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2018
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ftdatacite:10.6084/m9.figshare.7177412.v1 2023-05-15T13:34:21+02:00 Intraformational unconformities as a record of late Miocene eustatic falls of sea level in the Pisco Formation (southern Peru) Celma, Claudio Di Malinverno, Elisa Bosio, Giulia Gariboldi, Karen Collareta, Alberto Gioncada, Anna Landini, Walter Pierantoni, Pietro Paolo Bianucci, Giovanni 2018 https://dx.doi.org/10.6084/m9.figshare.7177412.v1 https://tandf.figshare.com/articles/Intraformational_unconformities_as_a_record_of_late_Miocene_eustatic_falls_of_sea_level_in_the_Pisco_Formation_southern_Peru_/7177412/1 unknown Taylor & Francis https://dx.doi.org/10.1080/17445647.2018.1517701 https://dx.doi.org/10.6084/m9.figshare.7177412 Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 CC-BY 59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences 39999 Chemical Sciences not elsewhere classified FOS Chemical sciences Ecology FOS Biological sciences Inorganic Chemistry Computational Biology Text article-journal Journal contribution ScholarlyArticle 2018 ftdatacite https://doi.org/10.6084/m9.figshare.7177412.v1 https://doi.org/10.1080/17445647.2018.1517701 https://doi.org/10.6084/m9.figshare.7177412 2021-11-05T12:55:41Z Field mapping and sedimentological study of outcrop sections exposed along the Ica River valley permitted the establishment of a regional allostratigraphic framework for the upper Miocene portion of the Pisco Formation. The stratigraphy of the studied interval is illustrated using a new 1:20,000-scale geological map which reveals that this formation is a cyclical sedimentary succession composed of three fining-upward allomembers. The bounding surfaces defining each allomember are transgressively modified subaerial unconformities. They converge and merge landward into a single composite surface representing the time-transgressive lower boundary of the Pisco Formation. Accordingly, the extent of the stratigraphic gap associated with the basal unconformity varies significantly throughout the basin and increases toward the basin margins. The timing of allomember-bounding surfaces coincides with that of major oxygen-isotope maxima in the deep-sea oxygen isotopic record and matches the ages of eustatic sequence boundaries identified elsewhere, indicating glacio-eustatic falls due to the growth of Antarctica ice sheets as a viable mechanism for their development. Text Antarc* Antarctica DataCite Metadata Store (German National Library of Science and Technology) Pisco ENVELOPE(-62.450,-62.450,-62.950,-62.950) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
unknown |
topic |
59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences 39999 Chemical Sciences not elsewhere classified FOS Chemical sciences Ecology FOS Biological sciences Inorganic Chemistry Computational Biology |
spellingShingle |
59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences 39999 Chemical Sciences not elsewhere classified FOS Chemical sciences Ecology FOS Biological sciences Inorganic Chemistry Computational Biology Celma, Claudio Di Malinverno, Elisa Bosio, Giulia Gariboldi, Karen Collareta, Alberto Gioncada, Anna Landini, Walter Pierantoni, Pietro Paolo Bianucci, Giovanni Intraformational unconformities as a record of late Miocene eustatic falls of sea level in the Pisco Formation (southern Peru) |
topic_facet |
59999 Environmental Sciences not elsewhere classified FOS Earth and related environmental sciences 39999 Chemical Sciences not elsewhere classified FOS Chemical sciences Ecology FOS Biological sciences Inorganic Chemistry Computational Biology |
description |
Field mapping and sedimentological study of outcrop sections exposed along the Ica River valley permitted the establishment of a regional allostratigraphic framework for the upper Miocene portion of the Pisco Formation. The stratigraphy of the studied interval is illustrated using a new 1:20,000-scale geological map which reveals that this formation is a cyclical sedimentary succession composed of three fining-upward allomembers. The bounding surfaces defining each allomember are transgressively modified subaerial unconformities. They converge and merge landward into a single composite surface representing the time-transgressive lower boundary of the Pisco Formation. Accordingly, the extent of the stratigraphic gap associated with the basal unconformity varies significantly throughout the basin and increases toward the basin margins. The timing of allomember-bounding surfaces coincides with that of major oxygen-isotope maxima in the deep-sea oxygen isotopic record and matches the ages of eustatic sequence boundaries identified elsewhere, indicating glacio-eustatic falls due to the growth of Antarctica ice sheets as a viable mechanism for their development. |
format |
Text |
author |
Celma, Claudio Di Malinverno, Elisa Bosio, Giulia Gariboldi, Karen Collareta, Alberto Gioncada, Anna Landini, Walter Pierantoni, Pietro Paolo Bianucci, Giovanni |
author_facet |
Celma, Claudio Di Malinverno, Elisa Bosio, Giulia Gariboldi, Karen Collareta, Alberto Gioncada, Anna Landini, Walter Pierantoni, Pietro Paolo Bianucci, Giovanni |
author_sort |
Celma, Claudio Di |
title |
Intraformational unconformities as a record of late Miocene eustatic falls of sea level in the Pisco Formation (southern Peru) |
title_short |
Intraformational unconformities as a record of late Miocene eustatic falls of sea level in the Pisco Formation (southern Peru) |
title_full |
Intraformational unconformities as a record of late Miocene eustatic falls of sea level in the Pisco Formation (southern Peru) |
title_fullStr |
Intraformational unconformities as a record of late Miocene eustatic falls of sea level in the Pisco Formation (southern Peru) |
title_full_unstemmed |
Intraformational unconformities as a record of late Miocene eustatic falls of sea level in the Pisco Formation (southern Peru) |
title_sort |
intraformational unconformities as a record of late miocene eustatic falls of sea level in the pisco formation (southern peru) |
publisher |
Taylor & Francis |
publishDate |
2018 |
url |
https://dx.doi.org/10.6084/m9.figshare.7177412.v1 https://tandf.figshare.com/articles/Intraformational_unconformities_as_a_record_of_late_Miocene_eustatic_falls_of_sea_level_in_the_Pisco_Formation_southern_Peru_/7177412/1 |
long_lat |
ENVELOPE(-62.450,-62.450,-62.950,-62.950) |
geographic |
Pisco |
geographic_facet |
Pisco |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_relation |
https://dx.doi.org/10.1080/17445647.2018.1517701 https://dx.doi.org/10.6084/m9.figshare.7177412 |
op_rights |
Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.6084/m9.figshare.7177412.v1 https://doi.org/10.1080/17445647.2018.1517701 https://doi.org/10.6084/m9.figshare.7177412 |
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1766051967899009024 |