Sequence Stratigraphy of the ANDRILL AND-2A Drillcore, Antarctica: a Long-Term, Ice-Proximal Record of Early to Mid-Miocene Climate, Sea-Level and Glacial Dynamism
Present understanding of Antarctic climate change during the Early to Mid-Miocene, including major cycles of glacial expansion and contraction, relies in large part on stable isotope proxies from deep sea core drilling. Here, we summarize the lithostratigraphy of the ANDRILL Southern McMurdo Sound P...
Published in: | Palaeogeography, Palaeoclimatology, Palaeoecology |
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Montclair State University Digital Commons
2011
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Online Access: | https://digitalcommons.montclair.edu/earth-environ-studies-facpubs/530 https://doi.org/10.1016/j.palaeo.2011.03.026 |
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ftmontclairstuni:oai:digitalcommons.montclair.edu:earth-environ-studies-facpubs-1529 |
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ftmontclairstuni:oai:digitalcommons.montclair.edu:earth-environ-studies-facpubs-1529 2023-07-23T04:15:42+02:00 Sequence Stratigraphy of the ANDRILL AND-2A Drillcore, Antarctica: a Long-Term, Ice-Proximal Record of Early to Mid-Miocene Climate, Sea-Level and Glacial Dynamism Fielding, Christopher R. Browne, Greg H. Field, Brad Florindo, Fabio Harwood, David M. Krissek, Lawrence A. Levy, Richard H. Panter, Kurt S. Passchier, Sandra Pekar, Stephen F. 2011-05-15T07:00:00Z https://digitalcommons.montclair.edu/earth-environ-studies-facpubs/530 https://doi.org/10.1016/j.palaeo.2011.03.026 unknown Montclair State University Digital Commons https://digitalcommons.montclair.edu/earth-environ-studies-facpubs/530 doi:10.1016/j.palaeo.2011.03.026 Department of Earth and Environmental Studies Faculty Scholarship and Creative Works ANDRILL SMS project Antarctica Cyclicity Mid-Miocene Climatic Optimum Miocene Sequence stratigraphy text 2011 ftmontclairstuni https://doi.org/10.1016/j.palaeo.2011.03.026 2023-07-03T21:48:55Z Present understanding of Antarctic climate change during the Early to Mid-Miocene, including major cycles of glacial expansion and contraction, relies in large part on stable isotope proxies from deep sea core drilling. Here, we summarize the lithostratigraphy of the ANDRILL Southern McMurdo Sound Project drillcore AND-2A. This core offers a hitherto unavailable ice-proximal stratigraphic archive from a high-accommodation continental margin setting, and provides clear evidence of repeated fluctuations in climate, ice expansion/contraction and attendant sea-level change over the period c. 20.2-14.2. Ma, with a more fragmentary record of Late Miocene and Pliocene time. The core is divided into seventy-four high-frequency (fourth- or fifth-order) glacimarine sequences recording repeated advances and retreats of glaciers into and out of the Victoria Land Basin. The section can be resolved into thirteen longer-term, composite (third-order) sequences, which comprise packages of higher frequency sequences that show a consistent stratigraphic stacking pattern (Stratigraphic Motif). The distribution of the six recognized motifs indicates intervals of less and more ice-proximal, and temperate to subpolar/polar climate, through the Miocene period. The core demonstrates a dynamic climate regime throughout the Early to Mid-Miocene that may be correlated to some previously-recognized events such as the Mid-Miocene Climatic Optimum, and provides a detailed reference point from which to evaluate stable isotope proxy records from the deep-sea. Text Antarc* Antarctic Antarctica McMurdo Sound Victoria Land Montclair State University Digital Commons Antarctic Victoria Land McMurdo Sound Palaeogeography, Palaeoclimatology, Palaeoecology 305 1-4 337 351 |
institution |
Open Polar |
collection |
Montclair State University Digital Commons |
op_collection_id |
ftmontclairstuni |
language |
unknown |
topic |
ANDRILL SMS project Antarctica Cyclicity Mid-Miocene Climatic Optimum Miocene Sequence stratigraphy |
spellingShingle |
ANDRILL SMS project Antarctica Cyclicity Mid-Miocene Climatic Optimum Miocene Sequence stratigraphy Fielding, Christopher R. Browne, Greg H. Field, Brad Florindo, Fabio Harwood, David M. Krissek, Lawrence A. Levy, Richard H. Panter, Kurt S. Passchier, Sandra Pekar, Stephen F. Sequence Stratigraphy of the ANDRILL AND-2A Drillcore, Antarctica: a Long-Term, Ice-Proximal Record of Early to Mid-Miocene Climate, Sea-Level and Glacial Dynamism |
topic_facet |
ANDRILL SMS project Antarctica Cyclicity Mid-Miocene Climatic Optimum Miocene Sequence stratigraphy |
description |
Present understanding of Antarctic climate change during the Early to Mid-Miocene, including major cycles of glacial expansion and contraction, relies in large part on stable isotope proxies from deep sea core drilling. Here, we summarize the lithostratigraphy of the ANDRILL Southern McMurdo Sound Project drillcore AND-2A. This core offers a hitherto unavailable ice-proximal stratigraphic archive from a high-accommodation continental margin setting, and provides clear evidence of repeated fluctuations in climate, ice expansion/contraction and attendant sea-level change over the period c. 20.2-14.2. Ma, with a more fragmentary record of Late Miocene and Pliocene time. The core is divided into seventy-four high-frequency (fourth- or fifth-order) glacimarine sequences recording repeated advances and retreats of glaciers into and out of the Victoria Land Basin. The section can be resolved into thirteen longer-term, composite (third-order) sequences, which comprise packages of higher frequency sequences that show a consistent stratigraphic stacking pattern (Stratigraphic Motif). The distribution of the six recognized motifs indicates intervals of less and more ice-proximal, and temperate to subpolar/polar climate, through the Miocene period. The core demonstrates a dynamic climate regime throughout the Early to Mid-Miocene that may be correlated to some previously-recognized events such as the Mid-Miocene Climatic Optimum, and provides a detailed reference point from which to evaluate stable isotope proxy records from the deep-sea. |
format |
Text |
author |
Fielding, Christopher R. Browne, Greg H. Field, Brad Florindo, Fabio Harwood, David M. Krissek, Lawrence A. Levy, Richard H. Panter, Kurt S. Passchier, Sandra Pekar, Stephen F. |
author_facet |
Fielding, Christopher R. Browne, Greg H. Field, Brad Florindo, Fabio Harwood, David M. Krissek, Lawrence A. Levy, Richard H. Panter, Kurt S. Passchier, Sandra Pekar, Stephen F. |
author_sort |
Fielding, Christopher R. |
title |
Sequence Stratigraphy of the ANDRILL AND-2A Drillcore, Antarctica: a Long-Term, Ice-Proximal Record of Early to Mid-Miocene Climate, Sea-Level and Glacial Dynamism |
title_short |
Sequence Stratigraphy of the ANDRILL AND-2A Drillcore, Antarctica: a Long-Term, Ice-Proximal Record of Early to Mid-Miocene Climate, Sea-Level and Glacial Dynamism |
title_full |
Sequence Stratigraphy of the ANDRILL AND-2A Drillcore, Antarctica: a Long-Term, Ice-Proximal Record of Early to Mid-Miocene Climate, Sea-Level and Glacial Dynamism |
title_fullStr |
Sequence Stratigraphy of the ANDRILL AND-2A Drillcore, Antarctica: a Long-Term, Ice-Proximal Record of Early to Mid-Miocene Climate, Sea-Level and Glacial Dynamism |
title_full_unstemmed |
Sequence Stratigraphy of the ANDRILL AND-2A Drillcore, Antarctica: a Long-Term, Ice-Proximal Record of Early to Mid-Miocene Climate, Sea-Level and Glacial Dynamism |
title_sort |
sequence stratigraphy of the andrill and-2a drillcore, antarctica: a long-term, ice-proximal record of early to mid-miocene climate, sea-level and glacial dynamism |
publisher |
Montclair State University Digital Commons |
publishDate |
2011 |
url |
https://digitalcommons.montclair.edu/earth-environ-studies-facpubs/530 https://doi.org/10.1016/j.palaeo.2011.03.026 |
geographic |
Antarctic Victoria Land McMurdo Sound |
geographic_facet |
Antarctic Victoria Land McMurdo Sound |
genre |
Antarc* Antarctic Antarctica McMurdo Sound Victoria Land |
genre_facet |
Antarc* Antarctic Antarctica McMurdo Sound Victoria Land |
op_source |
Department of Earth and Environmental Studies Faculty Scholarship and Creative Works |
op_relation |
https://digitalcommons.montclair.edu/earth-environ-studies-facpubs/530 doi:10.1016/j.palaeo.2011.03.026 |
op_doi |
https://doi.org/10.1016/j.palaeo.2011.03.026 |
container_title |
Palaeogeography, Palaeoclimatology, Palaeoecology |
container_volume |
305 |
container_issue |
1-4 |
container_start_page |
337 |
op_container_end_page |
351 |
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1772176628414152704 |