Calcareous nannofossil abundance and datums of ODP Holes 171B-1051A and 171B-1052A, supplement to: Mita, Isao (2001): Data Report: Early to late Eocene calcareous nannofossil assemblages of Sites 1051 and 1052, Blake Nose, northwestern Atlantic Ocean. In: Kroon, D; Norris, RD; Klaus, A (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 171B, 1-28
During Ocean Drilling Program Leg 171B, a thick sequence of lower to middle Eocene sediments was recovered from Sites 1051 and 1052 at Blake Nose in the North Atlantic Ocean. Calcareous nannofossils are moderately well preserved in the upper to middle Eocene sediments but are moderate to poorly pres...
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ftdatacite:10.1594/pangaea.788261 2023-05-15T17:34:30+02:00 Calcareous nannofossil abundance and datums of ODP Holes 171B-1051A and 171B-1052A, supplement to: Mita, Isao (2001): Data Report: Early to late Eocene calcareous nannofossil assemblages of Sites 1051 and 1052, Blake Nose, northwestern Atlantic Ocean. In: Kroon, D; Norris, RD; Klaus, A (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 171B, 1-28 Mita, Isao 2001 application/zip https://dx.doi.org/10.1594/pangaea.788261 https://doi.pangaea.de/10.1594/PANGAEA.788261 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.2973/odp.proc.sr.171b.122.2001 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY Ocean Drilling Program ODP Supplementary Collection of Datasets Collection article 2001 ftdatacite https://doi.org/10.1594/pangaea.788261 https://doi.org/10.2973/odp.proc.sr.171b.122.2001 2022-02-08T16:24:46Z During Ocean Drilling Program Leg 171B, a thick sequence of lower to middle Eocene sediments was recovered from Sites 1051 and 1052 at Blake Nose in the North Atlantic Ocean. Calcareous nannofossils are moderately well preserved in the upper to middle Eocene sediments but are moderate to poorly preserved in the lower Eocene sediments. Calcareous nannofossils are diverse throughout the recovered sequence, which extends from nannofossil Zone CP8 to Subzone CP15a. The nannofossil biostratigraphy of these sites indicates the presence of a hiatus in Subzone CP12a in the middle Eocene, in which the major nannofossil assemblage changes dramatically from Toweius to reticulofenestrid; however, no major change in the nannoflora was observed across the Eocene/Paleocene boundary. Coccolith size evolution patterns were recognized. Coccolithus, Reticulofenestra, and Cribrocentrum specimens may suggest a trend of increasing size upward through the sedimentary sequence, but Dictyococcites does not show a similar simple trend. Most traditional zonal markers are present. The reworking of Discoaster sublodoensis and overgrowth of Tribrachiatus in the lower Eocene makes zonal subdivision of this part of the sequence difficult. For this reason, tentative nannofossil zonation is given for the lower Eocene. Article in Journal/Newspaper North Atlantic DataCite Metadata Store (German National Library of Science and Technology) Klaus ENVELOPE(24.117,24.117,65.717,65.717) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Ocean Drilling Program ODP |
spellingShingle |
Ocean Drilling Program ODP Mita, Isao Calcareous nannofossil abundance and datums of ODP Holes 171B-1051A and 171B-1052A, supplement to: Mita, Isao (2001): Data Report: Early to late Eocene calcareous nannofossil assemblages of Sites 1051 and 1052, Blake Nose, northwestern Atlantic Ocean. In: Kroon, D; Norris, RD; Klaus, A (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 171B, 1-28 |
topic_facet |
Ocean Drilling Program ODP |
description |
During Ocean Drilling Program Leg 171B, a thick sequence of lower to middle Eocene sediments was recovered from Sites 1051 and 1052 at Blake Nose in the North Atlantic Ocean. Calcareous nannofossils are moderately well preserved in the upper to middle Eocene sediments but are moderate to poorly preserved in the lower Eocene sediments. Calcareous nannofossils are diverse throughout the recovered sequence, which extends from nannofossil Zone CP8 to Subzone CP15a. The nannofossil biostratigraphy of these sites indicates the presence of a hiatus in Subzone CP12a in the middle Eocene, in which the major nannofossil assemblage changes dramatically from Toweius to reticulofenestrid; however, no major change in the nannoflora was observed across the Eocene/Paleocene boundary. Coccolith size evolution patterns were recognized. Coccolithus, Reticulofenestra, and Cribrocentrum specimens may suggest a trend of increasing size upward through the sedimentary sequence, but Dictyococcites does not show a similar simple trend. Most traditional zonal markers are present. The reworking of Discoaster sublodoensis and overgrowth of Tribrachiatus in the lower Eocene makes zonal subdivision of this part of the sequence difficult. For this reason, tentative nannofossil zonation is given for the lower Eocene. |
format |
Article in Journal/Newspaper |
author |
Mita, Isao |
author_facet |
Mita, Isao |
author_sort |
Mita, Isao |
title |
Calcareous nannofossil abundance and datums of ODP Holes 171B-1051A and 171B-1052A, supplement to: Mita, Isao (2001): Data Report: Early to late Eocene calcareous nannofossil assemblages of Sites 1051 and 1052, Blake Nose, northwestern Atlantic Ocean. In: Kroon, D; Norris, RD; Klaus, A (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 171B, 1-28 |
title_short |
Calcareous nannofossil abundance and datums of ODP Holes 171B-1051A and 171B-1052A, supplement to: Mita, Isao (2001): Data Report: Early to late Eocene calcareous nannofossil assemblages of Sites 1051 and 1052, Blake Nose, northwestern Atlantic Ocean. In: Kroon, D; Norris, RD; Klaus, A (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 171B, 1-28 |
title_full |
Calcareous nannofossil abundance and datums of ODP Holes 171B-1051A and 171B-1052A, supplement to: Mita, Isao (2001): Data Report: Early to late Eocene calcareous nannofossil assemblages of Sites 1051 and 1052, Blake Nose, northwestern Atlantic Ocean. In: Kroon, D; Norris, RD; Klaus, A (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 171B, 1-28 |
title_fullStr |
Calcareous nannofossil abundance and datums of ODP Holes 171B-1051A and 171B-1052A, supplement to: Mita, Isao (2001): Data Report: Early to late Eocene calcareous nannofossil assemblages of Sites 1051 and 1052, Blake Nose, northwestern Atlantic Ocean. In: Kroon, D; Norris, RD; Klaus, A (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 171B, 1-28 |
title_full_unstemmed |
Calcareous nannofossil abundance and datums of ODP Holes 171B-1051A and 171B-1052A, supplement to: Mita, Isao (2001): Data Report: Early to late Eocene calcareous nannofossil assemblages of Sites 1051 and 1052, Blake Nose, northwestern Atlantic Ocean. In: Kroon, D; Norris, RD; Klaus, A (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 171B, 1-28 |
title_sort |
calcareous nannofossil abundance and datums of odp holes 171b-1051a and 171b-1052a, supplement to: mita, isao (2001): data report: early to late eocene calcareous nannofossil assemblages of sites 1051 and 1052, blake nose, northwestern atlantic ocean. in: kroon, d; norris, rd; klaus, a (eds.) proceedings of the ocean drilling program, scientific results, college station, tx (ocean drilling program), 171b, 1-28 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
2001 |
url |
https://dx.doi.org/10.1594/pangaea.788261 https://doi.pangaea.de/10.1594/PANGAEA.788261 |
long_lat |
ENVELOPE(24.117,24.117,65.717,65.717) |
geographic |
Klaus |
geographic_facet |
Klaus |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://dx.doi.org/10.2973/odp.proc.sr.171b.122.2001 |
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.788261 https://doi.org/10.2973/odp.proc.sr.171b.122.2001 |
_version_ |
1766133367255859200 |