Maastrichtian North Atlantic warming, increasing stratification, and foraminiferal paleobiology at three timescales: Paleoceanography, v
[i] Analysis of 944 single specimens of three species of late Maastrichtian planktonic foraminifera (Racemiguembelina fructicosa, Contusotruncana contusa, and Rugoglobigerina rugosd) from 38 samples spanning the last 3 Myr of the Cretaceous shows consistent isotopic trends through time, consistent i...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.597.6296 2023-05-15T17:28:59+02:00 Maastrichtian North Atlantic warming, increasing stratification, and foraminiferal paleobiology at three timescales: Paleoceanography, v Carolina Isaza-londono Kenneth G. Macleod Brian T. Huber The Pennsylvania State University CiteSeerX Archives 2006 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.597.6296 http://si-pddr.si.edu/dspace/bitstream/10088/7433/1/paleo_Isaza_et_al_Maastrichtian.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.597.6296 http://si-pddr.si.edu/dspace/bitstream/10088/7433/1/paleo_Isaza_et_al_Maastrichtian.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://si-pddr.si.edu/dspace/bitstream/10088/7433/1/paleo_Isaza_et_al_Maastrichtian.pdf Citation Isaza-Londofio C K. G. MacLeod and B. T. Huber (2006 Maastrichtian North Atlantic warming increasing text 2006 ftciteseerx 2016-01-08T13:48:33Z [i] Analysis of 944 single specimens of three species of late Maastrichtian planktonic foraminifera (Racemiguembelina fructicosa, Contusotruncana contusa, and Rugoglobigerina rugosd) from 38 samples spanning the last 3 Myr of the Cretaceous shows consistent isotopic trends through time, consistent isotopic differences among taxa, and high within-sample isotopic variability throughout. Within-sample variability does not change systematically through time for any taxon, but average §'^0 values decrease by ~1.5%o, and average S'^C values diverge up section. Comparing taxa, average 6'^0 values are similar within most samples, but average 6'^C values generally decrease from R. fructicosa to R. rugosa to C. contusa. In addition, the within-sample variability of individual 6'^C measurements is larger for R. fructicosa than for either C. contusa or R. rugosa, an observation which is consistent with a photosymbiotic habitat for R. fructicosa. In terms of Maasfrichtian paleoceanography the negative §'^0 trend of ~1.5%o corresponds to a temperature increase of ~6°C, and the divergence of o ^C values up section suggests an increasingly sfratified water column in the western Atlantic through the late Maasfrichtian. We suggest that these trends are best explained by increasing import of South Atlantic waters into the North Atlantic and an intensification of the Northern Hemisphere polar front. Text North Atlantic Planktonic foraminifera Unknown Macleod ENVELOPE(-61.966,-61.966,-64.091,-64.091) Rugosa ENVELOPE(-61.250,-61.250,-62.633,-62.633) |
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ftciteseerx |
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English |
topic |
Citation Isaza-Londofio C K. G. MacLeod and B. T. Huber (2006 Maastrichtian North Atlantic warming increasing |
spellingShingle |
Citation Isaza-Londofio C K. G. MacLeod and B. T. Huber (2006 Maastrichtian North Atlantic warming increasing Carolina Isaza-londono Kenneth G. Macleod Brian T. Huber Maastrichtian North Atlantic warming, increasing stratification, and foraminiferal paleobiology at three timescales: Paleoceanography, v |
topic_facet |
Citation Isaza-Londofio C K. G. MacLeod and B. T. Huber (2006 Maastrichtian North Atlantic warming increasing |
description |
[i] Analysis of 944 single specimens of three species of late Maastrichtian planktonic foraminifera (Racemiguembelina fructicosa, Contusotruncana contusa, and Rugoglobigerina rugosd) from 38 samples spanning the last 3 Myr of the Cretaceous shows consistent isotopic trends through time, consistent isotopic differences among taxa, and high within-sample isotopic variability throughout. Within-sample variability does not change systematically through time for any taxon, but average §'^0 values decrease by ~1.5%o, and average S'^C values diverge up section. Comparing taxa, average 6'^0 values are similar within most samples, but average 6'^C values generally decrease from R. fructicosa to R. rugosa to C. contusa. In addition, the within-sample variability of individual 6'^C measurements is larger for R. fructicosa than for either C. contusa or R. rugosa, an observation which is consistent with a photosymbiotic habitat for R. fructicosa. In terms of Maasfrichtian paleoceanography the negative §'^0 trend of ~1.5%o corresponds to a temperature increase of ~6°C, and the divergence of o ^C values up section suggests an increasingly sfratified water column in the western Atlantic through the late Maasfrichtian. We suggest that these trends are best explained by increasing import of South Atlantic waters into the North Atlantic and an intensification of the Northern Hemisphere polar front. |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Carolina Isaza-londono Kenneth G. Macleod Brian T. Huber |
author_facet |
Carolina Isaza-londono Kenneth G. Macleod Brian T. Huber |
author_sort |
Carolina Isaza-londono |
title |
Maastrichtian North Atlantic warming, increasing stratification, and foraminiferal paleobiology at three timescales: Paleoceanography, v |
title_short |
Maastrichtian North Atlantic warming, increasing stratification, and foraminiferal paleobiology at three timescales: Paleoceanography, v |
title_full |
Maastrichtian North Atlantic warming, increasing stratification, and foraminiferal paleobiology at three timescales: Paleoceanography, v |
title_fullStr |
Maastrichtian North Atlantic warming, increasing stratification, and foraminiferal paleobiology at three timescales: Paleoceanography, v |
title_full_unstemmed |
Maastrichtian North Atlantic warming, increasing stratification, and foraminiferal paleobiology at three timescales: Paleoceanography, v |
title_sort |
maastrichtian north atlantic warming, increasing stratification, and foraminiferal paleobiology at three timescales: paleoceanography, v |
publishDate |
2006 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.597.6296 http://si-pddr.si.edu/dspace/bitstream/10088/7433/1/paleo_Isaza_et_al_Maastrichtian.pdf |
long_lat |
ENVELOPE(-61.966,-61.966,-64.091,-64.091) ENVELOPE(-61.250,-61.250,-62.633,-62.633) |
geographic |
Macleod Rugosa |
geographic_facet |
Macleod Rugosa |
genre |
North Atlantic Planktonic foraminifera |
genre_facet |
North Atlantic Planktonic foraminifera |
op_source |
http://si-pddr.si.edu/dspace/bitstream/10088/7433/1/paleo_Isaza_et_al_Maastrichtian.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.597.6296 http://si-pddr.si.edu/dspace/bitstream/10088/7433/1/paleo_Isaza_et_al_Maastrichtian.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766122299961901056 |