Relative abundance of pennate diatoms Thalassionema spp. and Thalassiothrix spp. im Upper Miocene-Lower Pliocene bulk sediment at ODP Hole 145-886B, North Pacific (Table 1)
Rapidly deposited Thalassionema-Thalassiothrti pennate diatom oozes previously have been described in Upper Miocene-Lower Pliocene sediment beneath the frontal boundary of the eastern equatorial Pacific. Here we document a new occurrence of Thalassionema-Thalassiothrix ooze in Upper Miocene-Lower Pl...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.679779 2023-05-15T18:28:32+02:00 Relative abundance of pennate diatoms Thalassionema spp. and Thalassiothrix spp. im Upper Miocene-Lower Pliocene bulk sediment at ODP Hole 145-886B, North Pacific (Table 1) Dickens, Gerald Roy Barron, John A LATITUDE: 44.689700 * LONGITUDE: -168.240000 * DATE/TIME START: 1992-04-09T18:15:00 * DATE/TIME END: 1992-09-05T06:15:00 * MINIMUM DEPTH, sediment/rock: 28.80 m * MAXIMUM DEPTH, sediment/rock: 34.55 m 1997-01-25 text/tab-separated-values, 27 data points https://doi.pangaea.de/10.1594/PANGAEA.679779 https://doi.org/10.1594/PANGAEA.679779 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.679779 https://doi.org/10.1594/PANGAEA.679779 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Dickens, Gerald Roy; Barron, John A (1997): A rapidly deposited pennate diatom ooze in Upper Miocene-Lower Pliocene sediment beneath the North Pacific polar front. Marine Micropaleontology, 31(3-4), 177-182, https://doi.org/10.1016/S0377-8398(97)00003-0 145-886B DEPTH sediment/rock DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Joides Resolution Leg145 North Pacific Ocean Ocean Drilling Program ODP Sample code/label Thalassionema spp. Thalassiothrix spp Dataset 1997 ftpangaea https://doi.org/10.1594/PANGAEA.679779 https://doi.org/10.1016/S0377-8398(97)00003-0 2023-01-20T08:44:25Z Rapidly deposited Thalassionema-Thalassiothrti pennate diatom oozes previously have been described in Upper Miocene-Lower Pliocene sediment beneath the frontal boundary of the eastern equatorial Pacific. Here we document a new occurrence of Thalassionema-Thalassiothrix ooze in Upper Miocene-Lower Pliocene sediment beneath the frontal boundary of the subarctic North Pacific. The ooze is a 6 m interval of siliceous sediment at Ocean Drilling Program (ODP) sites 885/886 that was rapidly deposited between approximately 5.0 and 5.9 Ma. Bulk sediment in this interval may contain greater than 85% pennate diatom tests. There are also abundant laminae and pockets that are composed entirely of Thalassionema and Thalassiothrix diatoms. The presence of a rapidly deposited ooze dominated by pennate diatoms indicates unusual past conditions in the overlying surface waters. Time coincident deposition of such oozes at two distinct frontal boundary locations of the Pacific suggests that the unusual surface water conditions were causally linked to large-scale oceanographic change. This same oceanographic change most likely involved (1) addition of nutrients to the ocean, or (2) redistribution of nutrients within the ocean. The occurrence and origin of pennate diatom oozes may be a key component to an integrative understanding of late Neogene paleoceanography and biogeochemical cycling. Dataset Subarctic PANGAEA - Data Publisher for Earth & Environmental Science Pacific ENVELOPE(-168.240000,-168.240000,44.689700,44.689700) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
145-886B DEPTH sediment/rock DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Joides Resolution Leg145 North Pacific Ocean Ocean Drilling Program ODP Sample code/label Thalassionema spp. Thalassiothrix spp |
spellingShingle |
145-886B DEPTH sediment/rock DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Joides Resolution Leg145 North Pacific Ocean Ocean Drilling Program ODP Sample code/label Thalassionema spp. Thalassiothrix spp Dickens, Gerald Roy Barron, John A Relative abundance of pennate diatoms Thalassionema spp. and Thalassiothrix spp. im Upper Miocene-Lower Pliocene bulk sediment at ODP Hole 145-886B, North Pacific (Table 1) |
topic_facet |
145-886B DEPTH sediment/rock DRILL Drilling/drill rig DSDP/ODP/IODP sample designation Joides Resolution Leg145 North Pacific Ocean Ocean Drilling Program ODP Sample code/label Thalassionema spp. Thalassiothrix spp |
description |
Rapidly deposited Thalassionema-Thalassiothrti pennate diatom oozes previously have been described in Upper Miocene-Lower Pliocene sediment beneath the frontal boundary of the eastern equatorial Pacific. Here we document a new occurrence of Thalassionema-Thalassiothrix ooze in Upper Miocene-Lower Pliocene sediment beneath the frontal boundary of the subarctic North Pacific. The ooze is a 6 m interval of siliceous sediment at Ocean Drilling Program (ODP) sites 885/886 that was rapidly deposited between approximately 5.0 and 5.9 Ma. Bulk sediment in this interval may contain greater than 85% pennate diatom tests. There are also abundant laminae and pockets that are composed entirely of Thalassionema and Thalassiothrix diatoms. The presence of a rapidly deposited ooze dominated by pennate diatoms indicates unusual past conditions in the overlying surface waters. Time coincident deposition of such oozes at two distinct frontal boundary locations of the Pacific suggests that the unusual surface water conditions were causally linked to large-scale oceanographic change. This same oceanographic change most likely involved (1) addition of nutrients to the ocean, or (2) redistribution of nutrients within the ocean. The occurrence and origin of pennate diatom oozes may be a key component to an integrative understanding of late Neogene paleoceanography and biogeochemical cycling. |
format |
Dataset |
author |
Dickens, Gerald Roy Barron, John A |
author_facet |
Dickens, Gerald Roy Barron, John A |
author_sort |
Dickens, Gerald Roy |
title |
Relative abundance of pennate diatoms Thalassionema spp. and Thalassiothrix spp. im Upper Miocene-Lower Pliocene bulk sediment at ODP Hole 145-886B, North Pacific (Table 1) |
title_short |
Relative abundance of pennate diatoms Thalassionema spp. and Thalassiothrix spp. im Upper Miocene-Lower Pliocene bulk sediment at ODP Hole 145-886B, North Pacific (Table 1) |
title_full |
Relative abundance of pennate diatoms Thalassionema spp. and Thalassiothrix spp. im Upper Miocene-Lower Pliocene bulk sediment at ODP Hole 145-886B, North Pacific (Table 1) |
title_fullStr |
Relative abundance of pennate diatoms Thalassionema spp. and Thalassiothrix spp. im Upper Miocene-Lower Pliocene bulk sediment at ODP Hole 145-886B, North Pacific (Table 1) |
title_full_unstemmed |
Relative abundance of pennate diatoms Thalassionema spp. and Thalassiothrix spp. im Upper Miocene-Lower Pliocene bulk sediment at ODP Hole 145-886B, North Pacific (Table 1) |
title_sort |
relative abundance of pennate diatoms thalassionema spp. and thalassiothrix spp. im upper miocene-lower pliocene bulk sediment at odp hole 145-886b, north pacific (table 1) |
publisher |
PANGAEA |
publishDate |
1997 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.679779 https://doi.org/10.1594/PANGAEA.679779 |
op_coverage |
LATITUDE: 44.689700 * LONGITUDE: -168.240000 * DATE/TIME START: 1992-04-09T18:15:00 * DATE/TIME END: 1992-09-05T06:15:00 * MINIMUM DEPTH, sediment/rock: 28.80 m * MAXIMUM DEPTH, sediment/rock: 34.55 m |
long_lat |
ENVELOPE(-168.240000,-168.240000,44.689700,44.689700) |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Subarctic |
genre_facet |
Subarctic |
op_source |
Supplement to: Dickens, Gerald Roy; Barron, John A (1997): A rapidly deposited pennate diatom ooze in Upper Miocene-Lower Pliocene sediment beneath the North Pacific polar front. Marine Micropaleontology, 31(3-4), 177-182, https://doi.org/10.1016/S0377-8398(97)00003-0 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.679779 https://doi.org/10.1594/PANGAEA.679779 |
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.679779 https://doi.org/10.1016/S0377-8398(97)00003-0 |
_version_ |
1766211058549129216 |