Stable isotope record, Mg/Ca ratios and age model of St. Stephens Quarry, Alabama
In the largest global cooling event of the Cenozoic Era, between 33.8 and 33.5 Myr ago, warm, high-CO2 conditions gave way to the variable 'icehouse' climates that prevail today. Despite intense study, the history of cooling versus ice-sheet growth and sea-level fall reconstructed from oxy...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.769587 2024-09-15T18:12:32+00:00 Stable isotope record, Mg/Ca ratios and age model of St. Stephens Quarry, Alabama Katz, Miriam E Miller, Kenneth G Wright, James D Wade, Bridget S Browning, James V Cramer, Benjamin S Rosenthal, Yair MEDIAN LATITUDE: 15.073684 * MEDIAN LONGITUDE: -75.000241 * SOUTH-BOUND LATITUDE: -26.114000 * WEST-BOUND LONGITUDE: -135.366660 * NORTH-BOUND LATITUDE: 31.550000 * EAST-BOUND LONGITUDE: -5.129700 * DATE/TIME START: 1980-05-06T00:00:00 * DATE/TIME END: 2001-11-14T00:00:00 2008 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.769587 https://doi.org/10.1594/PANGAEA.769587 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.769587 https://doi.org/10.1594/PANGAEA.769587 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Katz, Miriam E; Miller, Kenneth G; Wright, James D; Wade, Bridget S; Browning, James V; Cramer, Benjamin S; Rosenthal, Yair (2008): Stepwise transition from the Eocene greenhouse to the Oligocene icehouse. Nature Geoscience, 1, 329-334, https://doi.org/10.1038/ngeo179 199-1218 73-522_Site Alabama U.S.A. North America COMPCORE Composite Core Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Joides Resolution Leg199 Leg73 North Pacific Ocean Ocean Drilling Program ODP South Atlantic/PLATEAU SSQ St-Stephens-Quarry dataset publication series 2008 ftpangaea https://doi.org/10.1594/PANGAEA.76958710.1038/ngeo179 2024-07-24T02:31:21Z In the largest global cooling event of the Cenozoic Era, between 33.8 and 33.5 Myr ago, warm, high-CO2 conditions gave way to the variable 'icehouse' climates that prevail today. Despite intense study, the history of cooling versus ice-sheet growth and sea-level fall reconstructed from oxygen isotope values in marine sediments at the transition has not been resolved. Here, we analyse oxygen isotopes and Mg/Ca ratios of benthic foraminifera, and integrate the results with the stratigraphic record of sea-level change across the Eocene-Oligocene transition from a continental-shelf site at Saint Stephens Quarry, Alabama. Comparisons with deep-sea (Sites 522 (South Atlantic) and 1218 (Pacific)) d18O and Mg/Ca records enable us to reconstruct temperature, ice-volume and sea-level changes across the climate transition. Our records show that the transition occurred in at least three distinct steps, with an increasing influence of ice volume on the oxygen isotope record as the transition progressed. By the early Oligocene, ice sheets were ~25% larger than present. This growth was associated with a relative sea-level decrease of approximately 105 m, which equates to a 67 m eustatic fall. Other/Unknown Material Ice Sheet PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-135.366660,-5.129700,31.550000,-26.114000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
199-1218 73-522_Site Alabama U.S.A. North America COMPCORE Composite Core Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Joides Resolution Leg199 Leg73 North Pacific Ocean Ocean Drilling Program ODP South Atlantic/PLATEAU SSQ St-Stephens-Quarry |
spellingShingle |
199-1218 73-522_Site Alabama U.S.A. North America COMPCORE Composite Core Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Joides Resolution Leg199 Leg73 North Pacific Ocean Ocean Drilling Program ODP South Atlantic/PLATEAU SSQ St-Stephens-Quarry Katz, Miriam E Miller, Kenneth G Wright, James D Wade, Bridget S Browning, James V Cramer, Benjamin S Rosenthal, Yair Stable isotope record, Mg/Ca ratios and age model of St. Stephens Quarry, Alabama |
topic_facet |
199-1218 73-522_Site Alabama U.S.A. North America COMPCORE Composite Core Deep Sea Drilling Project DRILL Drilling/drill rig DSDP Glomar Challenger Joides Resolution Leg199 Leg73 North Pacific Ocean Ocean Drilling Program ODP South Atlantic/PLATEAU SSQ St-Stephens-Quarry |
description |
In the largest global cooling event of the Cenozoic Era, between 33.8 and 33.5 Myr ago, warm, high-CO2 conditions gave way to the variable 'icehouse' climates that prevail today. Despite intense study, the history of cooling versus ice-sheet growth and sea-level fall reconstructed from oxygen isotope values in marine sediments at the transition has not been resolved. Here, we analyse oxygen isotopes and Mg/Ca ratios of benthic foraminifera, and integrate the results with the stratigraphic record of sea-level change across the Eocene-Oligocene transition from a continental-shelf site at Saint Stephens Quarry, Alabama. Comparisons with deep-sea (Sites 522 (South Atlantic) and 1218 (Pacific)) d18O and Mg/Ca records enable us to reconstruct temperature, ice-volume and sea-level changes across the climate transition. Our records show that the transition occurred in at least three distinct steps, with an increasing influence of ice volume on the oxygen isotope record as the transition progressed. By the early Oligocene, ice sheets were ~25% larger than present. This growth was associated with a relative sea-level decrease of approximately 105 m, which equates to a 67 m eustatic fall. |
format |
Other/Unknown Material |
author |
Katz, Miriam E Miller, Kenneth G Wright, James D Wade, Bridget S Browning, James V Cramer, Benjamin S Rosenthal, Yair |
author_facet |
Katz, Miriam E Miller, Kenneth G Wright, James D Wade, Bridget S Browning, James V Cramer, Benjamin S Rosenthal, Yair |
author_sort |
Katz, Miriam E |
title |
Stable isotope record, Mg/Ca ratios and age model of St. Stephens Quarry, Alabama |
title_short |
Stable isotope record, Mg/Ca ratios and age model of St. Stephens Quarry, Alabama |
title_full |
Stable isotope record, Mg/Ca ratios and age model of St. Stephens Quarry, Alabama |
title_fullStr |
Stable isotope record, Mg/Ca ratios and age model of St. Stephens Quarry, Alabama |
title_full_unstemmed |
Stable isotope record, Mg/Ca ratios and age model of St. Stephens Quarry, Alabama |
title_sort |
stable isotope record, mg/ca ratios and age model of st. stephens quarry, alabama |
publisher |
PANGAEA |
publishDate |
2008 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.769587 https://doi.org/10.1594/PANGAEA.769587 |
op_coverage |
MEDIAN LATITUDE: 15.073684 * MEDIAN LONGITUDE: -75.000241 * SOUTH-BOUND LATITUDE: -26.114000 * WEST-BOUND LONGITUDE: -135.366660 * NORTH-BOUND LATITUDE: 31.550000 * EAST-BOUND LONGITUDE: -5.129700 * DATE/TIME START: 1980-05-06T00:00:00 * DATE/TIME END: 2001-11-14T00:00:00 |
long_lat |
ENVELOPE(-135.366660,-5.129700,31.550000,-26.114000) |
genre |
Ice Sheet |
genre_facet |
Ice Sheet |
op_source |
Supplement to: Katz, Miriam E; Miller, Kenneth G; Wright, James D; Wade, Bridget S; Browning, James V; Cramer, Benjamin S; Rosenthal, Yair (2008): Stepwise transition from the Eocene greenhouse to the Oligocene icehouse. Nature Geoscience, 1, 329-334, https://doi.org/10.1038/ngeo179 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.769587 https://doi.org/10.1594/PANGAEA.769587 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.76958710.1038/ngeo179 |
_version_ |
1810450116228677632 |