Calcareous nannofossils of ODP Leg 103 holes
Ocean Drilling Program Leg 103 occupied five sites on the Galicia margin, northwest of the Iberian Peninsula. Two holes (Holes 637A and 638B) yielded significant Cenozoic sedimentary sections ranging from late Miocene to late Pleistocene in age. From the nannofossil stratigraphy, one hiatus is recog...
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1988
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.743817 2023-05-15T17:34:25+02:00 Calcareous nannofossils of ODP Leg 103 holes Wei, Wuchang Bergen, James A Applegate, Joseph L MEDIAN LATITUDE: 42.120800 * MEDIAN LONGITUDE: -12.530000 * SOUTH-BOUND LATITUDE: 42.088300 * WEST-BOUND LONGITUDE: -12.863300 * NORTH-BOUND LATITUDE: 42.153300 * EAST-BOUND LONGITUDE: -12.196700 * DATE/TIME START: 1985-04-28T18:00:00 * DATE/TIME END: 1985-05-12T23:15:00 1988-08-03 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.743817 https://doi.org/10.1594/PANGAEA.743817 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.743817 https://doi.org/10.1594/PANGAEA.743817 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess CC-BY Supplement to: Wei, Wuchang; Bergen, James A; Applegate, Joseph L (1988): Cenozoic calcareous nannofossils from the Galicia margin, Ocean Drilling Program Leg 103. In: Boillot, G; Winterer, EL; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 103, 279-292, https://doi.org/10.2973/odp.proc.sr.103.143.1988 103-637A 103-638B DRILL Drilling/drill rig Joides Resolution Leg103 North Atlantic Ocean Ocean Drilling Program ODP Dataset 1988 ftpangaea https://doi.org/10.1594/PANGAEA.743817 https://doi.org/10.2973/odp.proc.sr.103.143.1988 2023-01-20T07:31:51Z Ocean Drilling Program Leg 103 occupied five sites on the Galicia margin, northwest of the Iberian Peninsula. Two holes (Holes 637A and 638B) yielded significant Cenozoic sedimentary sections ranging from late Miocene to late Pleistocene in age. From the nannofossil stratigraphy, one hiatus is recognized in Hole 637A (2.35-2.4 Ma), whereas two hiatuses (one at 1.9-2.6 Ma and another at 3.5-3.7 Ma) are recognized in Hole 638B. Sediment-accumulation rates for the Cenozoic portions of these two holes have been calculated based on the nannofossil datums. The abundance ratios of Coccolithus pelagicus to Discoaster brouweri for Hole 637A show relatively low values and small fluctuations from 2.5 to 6.5 Ma but sharply increase and then widely fluctuate beginning at about 2.5 Ma. This may indicate relatively warmer, more stable surface-water temperatures from 2.5 to 6.5 Ma and cooler, variable surface-water temperatures after 2.5 Ma at Site 637. C. pelagicus/D. brouweri ratios from Hole 638B also show a trend of increasing values with time from late Miocene to late Pliocene, but with more fluctuations and a different pattern from that of Hole 637A. Dataset North Atlantic PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(-12.863300,-12.196700,42.153300,42.088300) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
103-637A 103-638B DRILL Drilling/drill rig Joides Resolution Leg103 North Atlantic Ocean Ocean Drilling Program ODP |
spellingShingle |
103-637A 103-638B DRILL Drilling/drill rig Joides Resolution Leg103 North Atlantic Ocean Ocean Drilling Program ODP Wei, Wuchang Bergen, James A Applegate, Joseph L Calcareous nannofossils of ODP Leg 103 holes |
topic_facet |
103-637A 103-638B DRILL Drilling/drill rig Joides Resolution Leg103 North Atlantic Ocean Ocean Drilling Program ODP |
description |
Ocean Drilling Program Leg 103 occupied five sites on the Galicia margin, northwest of the Iberian Peninsula. Two holes (Holes 637A and 638B) yielded significant Cenozoic sedimentary sections ranging from late Miocene to late Pleistocene in age. From the nannofossil stratigraphy, one hiatus is recognized in Hole 637A (2.35-2.4 Ma), whereas two hiatuses (one at 1.9-2.6 Ma and another at 3.5-3.7 Ma) are recognized in Hole 638B. Sediment-accumulation rates for the Cenozoic portions of these two holes have been calculated based on the nannofossil datums. The abundance ratios of Coccolithus pelagicus to Discoaster brouweri for Hole 637A show relatively low values and small fluctuations from 2.5 to 6.5 Ma but sharply increase and then widely fluctuate beginning at about 2.5 Ma. This may indicate relatively warmer, more stable surface-water temperatures from 2.5 to 6.5 Ma and cooler, variable surface-water temperatures after 2.5 Ma at Site 637. C. pelagicus/D. brouweri ratios from Hole 638B also show a trend of increasing values with time from late Miocene to late Pliocene, but with more fluctuations and a different pattern from that of Hole 637A. |
format |
Dataset |
author |
Wei, Wuchang Bergen, James A Applegate, Joseph L |
author_facet |
Wei, Wuchang Bergen, James A Applegate, Joseph L |
author_sort |
Wei, Wuchang |
title |
Calcareous nannofossils of ODP Leg 103 holes |
title_short |
Calcareous nannofossils of ODP Leg 103 holes |
title_full |
Calcareous nannofossils of ODP Leg 103 holes |
title_fullStr |
Calcareous nannofossils of ODP Leg 103 holes |
title_full_unstemmed |
Calcareous nannofossils of ODP Leg 103 holes |
title_sort |
calcareous nannofossils of odp leg 103 holes |
publisher |
PANGAEA |
publishDate |
1988 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.743817 https://doi.org/10.1594/PANGAEA.743817 |
op_coverage |
MEDIAN LATITUDE: 42.120800 * MEDIAN LONGITUDE: -12.530000 * SOUTH-BOUND LATITUDE: 42.088300 * WEST-BOUND LONGITUDE: -12.863300 * NORTH-BOUND LATITUDE: 42.153300 * EAST-BOUND LONGITUDE: -12.196700 * DATE/TIME START: 1985-04-28T18:00:00 * DATE/TIME END: 1985-05-12T23:15:00 |
long_lat |
ENVELOPE(-12.863300,-12.196700,42.153300,42.088300) |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Supplement to: Wei, Wuchang; Bergen, James A; Applegate, Joseph L (1988): Cenozoic calcareous nannofossils from the Galicia margin, Ocean Drilling Program Leg 103. In: Boillot, G; Winterer, EL; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 103, 279-292, https://doi.org/10.2973/odp.proc.sr.103.143.1988 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.743817 https://doi.org/10.1594/PANGAEA.743817 |
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.743817 https://doi.org/10.2973/odp.proc.sr.103.143.1988 |
_version_ |
1766133254886260736 |