Investigation of Pliocene foraminifera on sediment core CRP-1 from the Ross Sea, Antarctica, supplement to: Webb, Peter-Noel; Strong, C Percy (1998): Recycled Pliocene foraminifera from the CRP-1 Quaternary succession. Terra Antartica, 5(3), 473-478
Mixed assemblages of Pliocene and Quaternary foraminifera occur within the Quaternary succession of the CRP-1 drillhole. Pliocene foraminifera are not present in the lowermost Unit 4.1. are rare in Unit 3.1 and 2.3, are relatively common in Units 2.2 and 2.1, and are absent in Unit 1.1. Fifteen and...
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1998
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Online Access: | https://dx.doi.org/10.1594/pangaea.510746 https://doi.pangaea.de/10.1594/PANGAEA.510746 |
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ftdatacite:10.1594/pangaea.510746 2023-05-15T13:47:06+02:00 Investigation of Pliocene foraminifera on sediment core CRP-1 from the Ross Sea, Antarctica, supplement to: Webb, Peter-Noel; Strong, C Percy (1998): Recycled Pliocene foraminifera from the CRP-1 Quaternary succession. Terra Antartica, 5(3), 473-478 Webb, Peter-Noel Strong, C Percy 1998 application/zip https://dx.doi.org/10.1594/pangaea.510746 https://doi.pangaea.de/10.1594/PANGAEA.510746 en eng PANGAEA - Data Publisher for Earth & Environmental Science Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY Core wireline system CRP-1 Sampling/drilling ice Cape Roberts Project CRP Collection article Supplementary Collection of Datasets 1998 ftdatacite https://doi.org/10.1594/pangaea.510746 2021-11-05T12:55:41Z Mixed assemblages of Pliocene and Quaternary foraminifera occur within the Quaternary succession of the CRP-1 drillhole. Pliocene foraminifera are not present in the lowermost Unit 4.1. are rare in Unit 3.1 and 2.3, are relatively common in Units 2.2 and 2.1, and are absent in Unit 1.1. Fifteen and twelve species were documented in two of the samples from Units 2.2 and 2.1 respectively. A census count of foraminifera in a sample at 26.89 mbsf (Unit 2.2) indicated that 39% of the tests were from a Pliocene source, with the remaining 61% tests assigned to the in situ Quaternary assemblage. There appears to be a close correlation between the stratigraphic distribution of ice-rafted sediments and the test number and diversity of Pliocene taxa. It is concluded that Pliocene assemblages were not derived from submarine outcrops on Roberts Ridge, but are more likely to have been rafted to the site via major trunk valley drainage systems such as operated within the Mackay and Ferrar glacial valleys. The co-occurrence of marine biota (including foraminifera), fossil wood, pollen, and igneous clasts in the Quaternary succession of CRP-l, points to the marine and terrestrial facies of the Pliocene Sirius Group as a likely source. A major episode of erosion and transport of sediment into the offshore marine basins at about ~1 Ma may have been triggered by dynamism in the ice sheet-glacier system, an episode of regional uplift in the Transantarctic Mountains, sea level oscillations and associated changes in the land-to-sea drainage baselines, or some combination of these factors. Article in Journal/Newspaper Antarc* Antarctica antartic* Ice Sheet Ross Sea DataCite Metadata Store (German National Library of Science and Technology) Ross Sea Transantarctic Mountains Webb ENVELOPE(146.867,146.867,-67.867,-67.867) Cape Roberts ENVELOPE(-70.467,-70.467,-68.950,-68.950) Mackay ENVELOPE(168.517,168.517,-77.700,-77.700) Sirius ENVELOPE(163.250,163.250,-84.133,-84.133) Percy ENVELOPE(-55.883,-55.883,-63.250,-63.250) Roberts Ridge ENVELOPE(-131.500,-131.500,-86.383,-86.383) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Core wireline system CRP-1 Sampling/drilling ice Cape Roberts Project CRP |
spellingShingle |
Core wireline system CRP-1 Sampling/drilling ice Cape Roberts Project CRP Webb, Peter-Noel Strong, C Percy Investigation of Pliocene foraminifera on sediment core CRP-1 from the Ross Sea, Antarctica, supplement to: Webb, Peter-Noel; Strong, C Percy (1998): Recycled Pliocene foraminifera from the CRP-1 Quaternary succession. Terra Antartica, 5(3), 473-478 |
topic_facet |
Core wireline system CRP-1 Sampling/drilling ice Cape Roberts Project CRP |
description |
Mixed assemblages of Pliocene and Quaternary foraminifera occur within the Quaternary succession of the CRP-1 drillhole. Pliocene foraminifera are not present in the lowermost Unit 4.1. are rare in Unit 3.1 and 2.3, are relatively common in Units 2.2 and 2.1, and are absent in Unit 1.1. Fifteen and twelve species were documented in two of the samples from Units 2.2 and 2.1 respectively. A census count of foraminifera in a sample at 26.89 mbsf (Unit 2.2) indicated that 39% of the tests were from a Pliocene source, with the remaining 61% tests assigned to the in situ Quaternary assemblage. There appears to be a close correlation between the stratigraphic distribution of ice-rafted sediments and the test number and diversity of Pliocene taxa. It is concluded that Pliocene assemblages were not derived from submarine outcrops on Roberts Ridge, but are more likely to have been rafted to the site via major trunk valley drainage systems such as operated within the Mackay and Ferrar glacial valleys. The co-occurrence of marine biota (including foraminifera), fossil wood, pollen, and igneous clasts in the Quaternary succession of CRP-l, points to the marine and terrestrial facies of the Pliocene Sirius Group as a likely source. A major episode of erosion and transport of sediment into the offshore marine basins at about ~1 Ma may have been triggered by dynamism in the ice sheet-glacier system, an episode of regional uplift in the Transantarctic Mountains, sea level oscillations and associated changes in the land-to-sea drainage baselines, or some combination of these factors. |
format |
Article in Journal/Newspaper |
author |
Webb, Peter-Noel Strong, C Percy |
author_facet |
Webb, Peter-Noel Strong, C Percy |
author_sort |
Webb, Peter-Noel |
title |
Investigation of Pliocene foraminifera on sediment core CRP-1 from the Ross Sea, Antarctica, supplement to: Webb, Peter-Noel; Strong, C Percy (1998): Recycled Pliocene foraminifera from the CRP-1 Quaternary succession. Terra Antartica, 5(3), 473-478 |
title_short |
Investigation of Pliocene foraminifera on sediment core CRP-1 from the Ross Sea, Antarctica, supplement to: Webb, Peter-Noel; Strong, C Percy (1998): Recycled Pliocene foraminifera from the CRP-1 Quaternary succession. Terra Antartica, 5(3), 473-478 |
title_full |
Investigation of Pliocene foraminifera on sediment core CRP-1 from the Ross Sea, Antarctica, supplement to: Webb, Peter-Noel; Strong, C Percy (1998): Recycled Pliocene foraminifera from the CRP-1 Quaternary succession. Terra Antartica, 5(3), 473-478 |
title_fullStr |
Investigation of Pliocene foraminifera on sediment core CRP-1 from the Ross Sea, Antarctica, supplement to: Webb, Peter-Noel; Strong, C Percy (1998): Recycled Pliocene foraminifera from the CRP-1 Quaternary succession. Terra Antartica, 5(3), 473-478 |
title_full_unstemmed |
Investigation of Pliocene foraminifera on sediment core CRP-1 from the Ross Sea, Antarctica, supplement to: Webb, Peter-Noel; Strong, C Percy (1998): Recycled Pliocene foraminifera from the CRP-1 Quaternary succession. Terra Antartica, 5(3), 473-478 |
title_sort |
investigation of pliocene foraminifera on sediment core crp-1 from the ross sea, antarctica, supplement to: webb, peter-noel; strong, c percy (1998): recycled pliocene foraminifera from the crp-1 quaternary succession. terra antartica, 5(3), 473-478 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
1998 |
url |
https://dx.doi.org/10.1594/pangaea.510746 https://doi.pangaea.de/10.1594/PANGAEA.510746 |
long_lat |
ENVELOPE(146.867,146.867,-67.867,-67.867) ENVELOPE(-70.467,-70.467,-68.950,-68.950) ENVELOPE(168.517,168.517,-77.700,-77.700) ENVELOPE(163.250,163.250,-84.133,-84.133) ENVELOPE(-55.883,-55.883,-63.250,-63.250) ENVELOPE(-131.500,-131.500,-86.383,-86.383) |
geographic |
Ross Sea Transantarctic Mountains Webb Cape Roberts Mackay Sirius Percy Roberts Ridge |
geographic_facet |
Ross Sea Transantarctic Mountains Webb Cape Roberts Mackay Sirius Percy Roberts Ridge |
genre |
Antarc* Antarctica antartic* Ice Sheet Ross Sea |
genre_facet |
Antarc* Antarctica antartic* Ice Sheet Ross Sea |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/pangaea.510746 |
_version_ |
1766246327013867520 |