Paleomagnetic age assigments of ODP Site 113-697 (Table 1), supplement to: Pudsey, Carol J (1990): Grain size and diatom content of hemipelagic sediments at Site 697, ODP Leg 113: a record of Pliocene-Pleistocene climate. In: Barker, PF; Kennett, JP; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 113, 111-120
At Site 697 a 320 m thick Pleistocene and Pliocene section was recovered, consisting of hemipelagic terrigenous mud with varying amounts of diatoms, thin altered ash layers, and ice-rafted debris (IRD). Sedimentation rates range from 41 m/m.y. (upper Pleistocene) to 150 m/m.y. (lower Pliocene). Diat...
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ftdatacite:10.1594/pangaea.746490 2023-05-15T13:47:34+02:00 Paleomagnetic age assigments of ODP Site 113-697 (Table 1), supplement to: Pudsey, Carol J (1990): Grain size and diatom content of hemipelagic sediments at Site 697, ODP Leg 113: a record of Pliocene-Pleistocene climate. In: Barker, PF; Kennett, JP; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 113, 111-120 Pudsey, Carol J 1990 text/tab-separated-values https://dx.doi.org/10.1594/pangaea.746490 https://doi.pangaea.de/10.1594/PANGAEA.746490 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.2973/odp.proc.sr.113.147.1990 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY Datum level Age model DEPTH, sediment/rock Composite Core Leg113 Joides Resolution Ocean Drilling Program ODP Supplementary Dataset dataset Dataset 1990 ftdatacite https://doi.org/10.1594/pangaea.746490 https://doi.org/10.2973/odp.proc.sr.113.147.1990 2022-02-08T16:24:46Z At Site 697 a 320 m thick Pleistocene and Pliocene section was recovered, consisting of hemipelagic terrigenous mud with varying amounts of diatoms, thin altered ash layers, and ice-rafted debris (IRD). Sedimentation rates range from 41 m/m.y. (upper Pleistocene) to 150 m/m.y. (lower Pliocene). Diatom percentage and sediment grain-size have been measured for the whole section with approximately one sample per 5,000 yr. IRD is most abundant in the lower Pliocene (sediments older than 4.5 Ma) following the first major West Antarctic glaciation. A decrease in IRD to near-zero above 3.2 Ma may record a transition from valley glaciers to a grounded ice-sheet on West Antarctica. Bottom current flow, recorded in sediments as the proportion of silt, was at a maximum around 3.0-3.3 Ma then gradually decreased until 0.5 Ma. In the upper Pleistocene, maxima in diatom percentage are assumed to occur during interglacials, implying reduced sea-ice cover; maxima in silt percentage correspond to diatom maxima, implying stronger bottom water flow during interglacials. : Analysts: Hamilton and O'Brien (in prep.). Magentic reversals inferred to lie within gaps in the section are omitted. Dataset Antarc* Antarctic Antarctica Ice Sheet Sea ice West Antarctica DataCite Metadata Store (German National Library of Science and Technology) Antarctic Kennett ENVELOPE(-65.167,-65.167,-67.117,-67.117) West Antarctica |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Datum level Age model DEPTH, sediment/rock Composite Core Leg113 Joides Resolution Ocean Drilling Program ODP |
spellingShingle |
Datum level Age model DEPTH, sediment/rock Composite Core Leg113 Joides Resolution Ocean Drilling Program ODP Pudsey, Carol J Paleomagnetic age assigments of ODP Site 113-697 (Table 1), supplement to: Pudsey, Carol J (1990): Grain size and diatom content of hemipelagic sediments at Site 697, ODP Leg 113: a record of Pliocene-Pleistocene climate. In: Barker, PF; Kennett, JP; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 113, 111-120 |
topic_facet |
Datum level Age model DEPTH, sediment/rock Composite Core Leg113 Joides Resolution Ocean Drilling Program ODP |
description |
At Site 697 a 320 m thick Pleistocene and Pliocene section was recovered, consisting of hemipelagic terrigenous mud with varying amounts of diatoms, thin altered ash layers, and ice-rafted debris (IRD). Sedimentation rates range from 41 m/m.y. (upper Pleistocene) to 150 m/m.y. (lower Pliocene). Diatom percentage and sediment grain-size have been measured for the whole section with approximately one sample per 5,000 yr. IRD is most abundant in the lower Pliocene (sediments older than 4.5 Ma) following the first major West Antarctic glaciation. A decrease in IRD to near-zero above 3.2 Ma may record a transition from valley glaciers to a grounded ice-sheet on West Antarctica. Bottom current flow, recorded in sediments as the proportion of silt, was at a maximum around 3.0-3.3 Ma then gradually decreased until 0.5 Ma. In the upper Pleistocene, maxima in diatom percentage are assumed to occur during interglacials, implying reduced sea-ice cover; maxima in silt percentage correspond to diatom maxima, implying stronger bottom water flow during interglacials. : Analysts: Hamilton and O'Brien (in prep.). Magentic reversals inferred to lie within gaps in the section are omitted. |
format |
Dataset |
author |
Pudsey, Carol J |
author_facet |
Pudsey, Carol J |
author_sort |
Pudsey, Carol J |
title |
Paleomagnetic age assigments of ODP Site 113-697 (Table 1), supplement to: Pudsey, Carol J (1990): Grain size and diatom content of hemipelagic sediments at Site 697, ODP Leg 113: a record of Pliocene-Pleistocene climate. In: Barker, PF; Kennett, JP; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 113, 111-120 |
title_short |
Paleomagnetic age assigments of ODP Site 113-697 (Table 1), supplement to: Pudsey, Carol J (1990): Grain size and diatom content of hemipelagic sediments at Site 697, ODP Leg 113: a record of Pliocene-Pleistocene climate. In: Barker, PF; Kennett, JP; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 113, 111-120 |
title_full |
Paleomagnetic age assigments of ODP Site 113-697 (Table 1), supplement to: Pudsey, Carol J (1990): Grain size and diatom content of hemipelagic sediments at Site 697, ODP Leg 113: a record of Pliocene-Pleistocene climate. In: Barker, PF; Kennett, JP; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 113, 111-120 |
title_fullStr |
Paleomagnetic age assigments of ODP Site 113-697 (Table 1), supplement to: Pudsey, Carol J (1990): Grain size and diatom content of hemipelagic sediments at Site 697, ODP Leg 113: a record of Pliocene-Pleistocene climate. In: Barker, PF; Kennett, JP; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 113, 111-120 |
title_full_unstemmed |
Paleomagnetic age assigments of ODP Site 113-697 (Table 1), supplement to: Pudsey, Carol J (1990): Grain size and diatom content of hemipelagic sediments at Site 697, ODP Leg 113: a record of Pliocene-Pleistocene climate. In: Barker, PF; Kennett, JP; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 113, 111-120 |
title_sort |
paleomagnetic age assigments of odp site 113-697 (table 1), supplement to: pudsey, carol j (1990): grain size and diatom content of hemipelagic sediments at site 697, odp leg 113: a record of pliocene-pleistocene climate. in: barker, pf; kennett, jp; et al. (eds.), proceedings of the ocean drilling program, scientific results, college station, tx (ocean drilling program), 113, 111-120 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
1990 |
url |
https://dx.doi.org/10.1594/pangaea.746490 https://doi.pangaea.de/10.1594/PANGAEA.746490 |
long_lat |
ENVELOPE(-65.167,-65.167,-67.117,-67.117) |
geographic |
Antarctic Kennett West Antarctica |
geographic_facet |
Antarctic Kennett West Antarctica |
genre |
Antarc* Antarctic Antarctica Ice Sheet Sea ice West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet Sea ice West Antarctica |
op_relation |
https://dx.doi.org/10.2973/odp.proc.sr.113.147.1990 |
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.746490 https://doi.org/10.2973/odp.proc.sr.113.147.1990 |
_version_ |
1766247319880073216 |