Distribution of phytolithes in CRP sediment cores from the Ross Sea, Antarctica
Phytoliths (siliceous plant microfossils) have been recovered from Cenozoic sediments (c. 34 to 17 Ma) in the CRP-2/2A and CRP-3 drillholes cored off Cape Roberts, Victoria Land Basin, Antarctica. The phytolith assemblages are sparse, but well-preserved and dominated by spherical forms similar to th...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.510767 2023-05-15T13:42:09+02:00 Distribution of phytolithes in CRP sediment cores from the Ross Sea, Antarctica Thorn, Vanessa C MEDIAN LATITUDE: -77.005990 * MEDIAN LONGITUDE: 163.719225 * SOUTH-BOUND LATITUDE: -77.006000 * WEST-BOUND LONGITUDE: 163.719000 * NORTH-BOUND LATITUDE: -77.005980 * EAST-BOUND LONGITUDE: 163.719450 * DATE/TIME START: 1998-10-16T07:30:00 * DATE/TIME END: 1999-11-19T00:00:00 2001-08-30 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.510767 https://doi.org/10.1594/PANGAEA.510767 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.510767 https://doi.org/10.1594/PANGAEA.510767 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Thorn, Vanessa C (2001): Oligocene and early Miocene phytolits from CRP-2/2A and CRP-3, Victoria Land Basin, Antarctica. Terra Antartica, 8(4), 407-422, hdl:10013/epic.28231.d001 14.2 km at 096° true from Cape Roberts Cape Roberts Project Core wireline system CRP CRP-2 CRP-2A CRP-3 CWS off Cape Roberts Ross Sea Antarctica Sampling/drilling from ice Dataset 2001 ftpangaea https://doi.org/10.1594/PANGAEA.510767 2023-01-20T07:30:59Z Phytoliths (siliceous plant microfossils) have been recovered from Cenozoic sediments (c. 34 to 17 Ma) in the CRP-2/2A and CRP-3 drillholes cored off Cape Roberts, Victoria Land Basin, Antarctica. The phytolith assemblages are sparse, but well-preserved and dominated by spherical forms similar to those of modern trees or shrubs. Rare phytoliths comparable to modern grass forms are also present. However, due to the paucity of phytolith data, any interpretations made are necessarily tentative. The assemblages of CRP-2/2A and the upper c. 250 m of CRP-3 are interpreted as representing a predominantly woody vegetation, including Nothofagus and Libocedrus with local areas of grass in the more exposed locations. A cool climate is interpreted to have prevailed throughout both cores. However, beneath c. 250 metres below sea floor in CRP-3, the dominant woody vegetation is supplemented by pockets of Palmae, ?Proteaceae and 'warm' climate grasses. This association represents vegetation growth in sheltered, moist sites – possibly north-facing mid-slopes or the coastal fringe. It may also represent remnant vegetation that grew in moist, temperate conditions during the Middle to Late Eocene, previously interpreted from the Southern McMurdo Sound erratics and lower part of the CIROS-1 drillhole. The phytolith analysis compares well to the terrestrial palynomorph record from both cores and provides additional independent taxonomic and climatic interpretations. Dataset Antarc* Antarctica McMurdo Sound Ross Sea Victoria Land PANGAEA - Data Publisher for Earth & Environmental Science Cape Roberts ENVELOPE(-70.467,-70.467,-68.950,-68.950) McMurdo Sound Roberts Cape ENVELOPE(163.200,163.200,-77.033,-77.033) Ross Sea Victoria Land ENVELOPE(163.719000,163.719450,-77.005980,-77.006000) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
14.2 km at 096° true from Cape Roberts Cape Roberts Project Core wireline system CRP CRP-2 CRP-2A CRP-3 CWS off Cape Roberts Ross Sea Antarctica Sampling/drilling from ice |
spellingShingle |
14.2 km at 096° true from Cape Roberts Cape Roberts Project Core wireline system CRP CRP-2 CRP-2A CRP-3 CWS off Cape Roberts Ross Sea Antarctica Sampling/drilling from ice Thorn, Vanessa C Distribution of phytolithes in CRP sediment cores from the Ross Sea, Antarctica |
topic_facet |
14.2 km at 096° true from Cape Roberts Cape Roberts Project Core wireline system CRP CRP-2 CRP-2A CRP-3 CWS off Cape Roberts Ross Sea Antarctica Sampling/drilling from ice |
description |
Phytoliths (siliceous plant microfossils) have been recovered from Cenozoic sediments (c. 34 to 17 Ma) in the CRP-2/2A and CRP-3 drillholes cored off Cape Roberts, Victoria Land Basin, Antarctica. The phytolith assemblages are sparse, but well-preserved and dominated by spherical forms similar to those of modern trees or shrubs. Rare phytoliths comparable to modern grass forms are also present. However, due to the paucity of phytolith data, any interpretations made are necessarily tentative. The assemblages of CRP-2/2A and the upper c. 250 m of CRP-3 are interpreted as representing a predominantly woody vegetation, including Nothofagus and Libocedrus with local areas of grass in the more exposed locations. A cool climate is interpreted to have prevailed throughout both cores. However, beneath c. 250 metres below sea floor in CRP-3, the dominant woody vegetation is supplemented by pockets of Palmae, ?Proteaceae and 'warm' climate grasses. This association represents vegetation growth in sheltered, moist sites – possibly north-facing mid-slopes or the coastal fringe. It may also represent remnant vegetation that grew in moist, temperate conditions during the Middle to Late Eocene, previously interpreted from the Southern McMurdo Sound erratics and lower part of the CIROS-1 drillhole. The phytolith analysis compares well to the terrestrial palynomorph record from both cores and provides additional independent taxonomic and climatic interpretations. |
format |
Dataset |
author |
Thorn, Vanessa C |
author_facet |
Thorn, Vanessa C |
author_sort |
Thorn, Vanessa C |
title |
Distribution of phytolithes in CRP sediment cores from the Ross Sea, Antarctica |
title_short |
Distribution of phytolithes in CRP sediment cores from the Ross Sea, Antarctica |
title_full |
Distribution of phytolithes in CRP sediment cores from the Ross Sea, Antarctica |
title_fullStr |
Distribution of phytolithes in CRP sediment cores from the Ross Sea, Antarctica |
title_full_unstemmed |
Distribution of phytolithes in CRP sediment cores from the Ross Sea, Antarctica |
title_sort |
distribution of phytolithes in crp sediment cores from the ross sea, antarctica |
publisher |
PANGAEA |
publishDate |
2001 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.510767 https://doi.org/10.1594/PANGAEA.510767 |
op_coverage |
MEDIAN LATITUDE: -77.005990 * MEDIAN LONGITUDE: 163.719225 * SOUTH-BOUND LATITUDE: -77.006000 * WEST-BOUND LONGITUDE: 163.719000 * NORTH-BOUND LATITUDE: -77.005980 * EAST-BOUND LONGITUDE: 163.719450 * DATE/TIME START: 1998-10-16T07:30:00 * DATE/TIME END: 1999-11-19T00:00:00 |
long_lat |
ENVELOPE(-70.467,-70.467,-68.950,-68.950) ENVELOPE(163.200,163.200,-77.033,-77.033) ENVELOPE(163.719000,163.719450,-77.005980,-77.006000) |
geographic |
Cape Roberts McMurdo Sound Roberts Cape Ross Sea Victoria Land |
geographic_facet |
Cape Roberts McMurdo Sound Roberts Cape Ross Sea Victoria Land |
genre |
Antarc* Antarctica McMurdo Sound Ross Sea Victoria Land |
genre_facet |
Antarc* Antarctica McMurdo Sound Ross Sea Victoria Land |
op_source |
Supplement to: Thorn, Vanessa C (2001): Oligocene and early Miocene phytolits from CRP-2/2A and CRP-3, Victoria Land Basin, Antarctica. Terra Antartica, 8(4), 407-422, hdl:10013/epic.28231.d001 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.510767 https://doi.org/10.1594/PANGAEA.510767 |
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.510767 |
_version_ |
1766163159438065664 |