Archive · dataset · 2001
Distribution of phytolithes in CRP sediment cores from the Ross Sea, Antarctica
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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.
Description
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.
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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.
Links
Catalogue records · 1
- OAI-PMH record oai.datacite.org/oai?verb=GetRecord&metadataPrefix=oai_dc&identifier=doi%3A10.1… ↗
metadata API · from gigadb org
Topics
- From keywords
- Earth & Environmental Science
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- Possibly the same asDistribution of phytolithes in CRP sediment cores from the Ross Sea, Antarctica
Provenance · 1 source records, 6 field assertions
| Source | Key | Last seen | Raw |
|---|---|---|---|
| GigaDB | doi:10.1594/pangaea.510767 | 16 h ago | JSON v1 |
| Field | Assertion | Extractor | Evidence |
|---|---|---|---|
| access_level | source · gigadb org | connector:gigadb_org@1.0.0 | |
| concepts[field].local:field:earth-environmental | mapping · gigadb org | connector:gigadb_org@1.0.0 | |
| description | source · gigadb org | connector:gigadb_org@1.0.0 | /metadata/dc/description |
| license | source · gigadb org | connector:gigadb_org@1.0.0 | /metadata/dc/rights |
| publication_date | source · gigadb org | connector:gigadb_org@1.0.0 | |
| title | source · gigadb org | connector:gigadb_org@1.0.0 | /metadata/dc/title |