(Table 1) Summary statistics of taxa in samples of ODP Hole 181-1123B
Planktonic foraminifera are used to identify late Pliocene-Quaternary near surface water masses on the northeastern flank of Chatham Rise by comparison with faunas in core-tops east of New Zealand. In an overview study, distance measures, ordinations, and discriminant analysis are applied to 32 faun...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.734647 2023-05-15T17:14:57+02:00 (Table 1) Summary statistics of taxa in samples of ODP Hole 181-1123B Scott, George H Hall, Ian R LATITUDE: -41.786000 * LONGITUDE: -171.498980 * DATE/TIME START: 1998-09-14T23:55:00 * DATE/TIME END: 1998-09-19T09:55:00 * MINIMUM ELEVATION: -3289.8 m * MAXIMUM ELEVATION: -3289.8 m 2004-08-17 text/tab-separated-values, 95 data points https://doi.pangaea.de/10.1594/PANGAEA.734647 https://doi.org/10.1594/PANGAEA.734647 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.734647 https://doi.org/10.1594/PANGAEA.734647 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Scott, George H; Hall, Ian R (2004): Planktonic foraminiferal evidence on late Pliocene-Quaternary near surface water masses at ODP Site 1123B, northern Chatham Rise, east of New Zealand. Marine Geology, 205(1-4), 127-145, https://doi.org/10.1016/S0025-3227(04)00021-0 181-1123B Calculated Counting >150 µm fraction DRILL Drilling/drill rig Joides Resolution Leg181 Maximum Mean statistical Minimum Ocean Drilling Program ODP South Pacific Ocean Species Standard deviation Dataset 2004 ftpangaea https://doi.org/10.1594/PANGAEA.734647 https://doi.org/10.1016/S0025-3227(04)00021-0 2023-01-20T08:49:46Z Planktonic foraminifera are used to identify late Pliocene-Quaternary near surface water masses on the northeastern flank of Chatham Rise by comparison with faunas in core-tops east of New Zealand. In an overview study, distance measures, ordinations, and discriminant analysis are applied to 32 faunas from Site 1123B to identify similar faunas among 35 core-tops between 35 and 61°S east of New Zealand. Many Site 1123B faunas in the 2.72 myr interval sampled compare with those in core-tops on the northern side of Chatham Rise from a similar latitude, and are identified as transitional zone assemblages now associated with the subtropical gyre. This result is consistent with studies of late Quaternary planktonic foraminifera from this region and suggests that, typically, the Subtropical Front was locked to Chatham Rise through glacial and interglacial periods, at least back to the late Pliocene. However, a fauna at ca. 1.17 Ma compares with subpolar assemblages in core-tops between 44 and 48°S and identifies cooler surface water. Expectedly, closer sampling may reveal additional periods when southern water moved over the northeastern flank of Chatham Rise. Although the dominance of Globorotalia inflata, a species typical of the southern margin of subtropical gyres, is a principal feature of Site 1123B faunas, in a minority it is replaced as the most abundant species by dextral populations of Neogloboquadrina pachyderma, particularly about the time of the middle Pleistocene transition. Close analogues of these variant transitional assemblages are not present in core-tops about Chatham Rise but sediment trap and coretop data from other regions suggest that they identify high fertility in the mixed layer associated with upwelling or mixing of water masses. The proportion of sinistrally coiled Neogloboquadrina pachyderma rises to ca. 0.6 between ca. 2.45 and 2.57 Ma, soon after the intensification of Northern Hemisphere glaciation. Although the coiling data indicate subantarctic near surface water, the species remains ... Dataset Neogloboquadrina pachyderma Planktonic foraminifera PANGAEA - Data Publisher for Earth & Environmental Science Pacific New Zealand ENVELOPE(-171.498980,-171.498980,-41.786000,-41.786000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
181-1123B Calculated Counting >150 µm fraction DRILL Drilling/drill rig Joides Resolution Leg181 Maximum Mean statistical Minimum Ocean Drilling Program ODP South Pacific Ocean Species Standard deviation |
spellingShingle |
181-1123B Calculated Counting >150 µm fraction DRILL Drilling/drill rig Joides Resolution Leg181 Maximum Mean statistical Minimum Ocean Drilling Program ODP South Pacific Ocean Species Standard deviation Scott, George H Hall, Ian R (Table 1) Summary statistics of taxa in samples of ODP Hole 181-1123B |
topic_facet |
181-1123B Calculated Counting >150 µm fraction DRILL Drilling/drill rig Joides Resolution Leg181 Maximum Mean statistical Minimum Ocean Drilling Program ODP South Pacific Ocean Species Standard deviation |
description |
Planktonic foraminifera are used to identify late Pliocene-Quaternary near surface water masses on the northeastern flank of Chatham Rise by comparison with faunas in core-tops east of New Zealand. In an overview study, distance measures, ordinations, and discriminant analysis are applied to 32 faunas from Site 1123B to identify similar faunas among 35 core-tops between 35 and 61°S east of New Zealand. Many Site 1123B faunas in the 2.72 myr interval sampled compare with those in core-tops on the northern side of Chatham Rise from a similar latitude, and are identified as transitional zone assemblages now associated with the subtropical gyre. This result is consistent with studies of late Quaternary planktonic foraminifera from this region and suggests that, typically, the Subtropical Front was locked to Chatham Rise through glacial and interglacial periods, at least back to the late Pliocene. However, a fauna at ca. 1.17 Ma compares with subpolar assemblages in core-tops between 44 and 48°S and identifies cooler surface water. Expectedly, closer sampling may reveal additional periods when southern water moved over the northeastern flank of Chatham Rise. Although the dominance of Globorotalia inflata, a species typical of the southern margin of subtropical gyres, is a principal feature of Site 1123B faunas, in a minority it is replaced as the most abundant species by dextral populations of Neogloboquadrina pachyderma, particularly about the time of the middle Pleistocene transition. Close analogues of these variant transitional assemblages are not present in core-tops about Chatham Rise but sediment trap and coretop data from other regions suggest that they identify high fertility in the mixed layer associated with upwelling or mixing of water masses. The proportion of sinistrally coiled Neogloboquadrina pachyderma rises to ca. 0.6 between ca. 2.45 and 2.57 Ma, soon after the intensification of Northern Hemisphere glaciation. Although the coiling data indicate subantarctic near surface water, the species remains ... |
format |
Dataset |
author |
Scott, George H Hall, Ian R |
author_facet |
Scott, George H Hall, Ian R |
author_sort |
Scott, George H |
title |
(Table 1) Summary statistics of taxa in samples of ODP Hole 181-1123B |
title_short |
(Table 1) Summary statistics of taxa in samples of ODP Hole 181-1123B |
title_full |
(Table 1) Summary statistics of taxa in samples of ODP Hole 181-1123B |
title_fullStr |
(Table 1) Summary statistics of taxa in samples of ODP Hole 181-1123B |
title_full_unstemmed |
(Table 1) Summary statistics of taxa in samples of ODP Hole 181-1123B |
title_sort |
(table 1) summary statistics of taxa in samples of odp hole 181-1123b |
publisher |
PANGAEA |
publishDate |
2004 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.734647 https://doi.org/10.1594/PANGAEA.734647 |
op_coverage |
LATITUDE: -41.786000 * LONGITUDE: -171.498980 * DATE/TIME START: 1998-09-14T23:55:00 * DATE/TIME END: 1998-09-19T09:55:00 * MINIMUM ELEVATION: -3289.8 m * MAXIMUM ELEVATION: -3289.8 m |
long_lat |
ENVELOPE(-171.498980,-171.498980,-41.786000,-41.786000) |
geographic |
Pacific New Zealand |
geographic_facet |
Pacific New Zealand |
genre |
Neogloboquadrina pachyderma Planktonic foraminifera |
genre_facet |
Neogloboquadrina pachyderma Planktonic foraminifera |
op_source |
Supplement to: Scott, George H; Hall, Ian R (2004): Planktonic foraminiferal evidence on late Pliocene-Quaternary near surface water masses at ODP Site 1123B, northern Chatham Rise, east of New Zealand. Marine Geology, 205(1-4), 127-145, https://doi.org/10.1016/S0025-3227(04)00021-0 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.734647 https://doi.org/10.1594/PANGAEA.734647 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/PANGAEA.734647 https://doi.org/10.1016/S0025-3227(04)00021-0 |
_version_ |
1766073064451211264 |