Nannoplankton Assemblage Succession Throughout Cretaceous/ Tertiary Boundary in the “P” Well Section, Santos Basin, Brazil
<p>DOI: <span><a href="http://dx.doi.org/10.17014/ijog.v6i1.115" target="_blank">10.17014/ijog.v6i1.115</a></span></p><p>The massive change in calcareous nannoplankton assemblages throughout Cretaceous/Tertiary (K/T) boundary (65.5 M.a.)...
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| Format: | Article |
| Language: | English |
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Geological Agency
2014-06-01
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| Series: | Indonesian Journal on Geoscience |
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| Online Access: | https://ijog.geologi.esdm.go.id/index.php/IJOG/article/view/115 |
| _version_ | 1828438099332431872 |
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| author | Panuju Panuju |
| author_facet | Panuju Panuju |
| author_sort | Panuju Panuju |
| collection | DOAJ |
| description | <p>DOI: <span><a href="http://dx.doi.org/10.17014/ijog.v6i1.115" target="_blank">10.17014/ijog.v6i1.115</a></span></p><p>The massive change in calcareous nannoplankton assemblages throughout Cretaceous/Tertiary (K/T) boundary (65.5 M.a.) has been illustrated by several authors. The diverse and abundant assemblage disappears suddenly above the Cretaceous/Tertiary boundary. This event is related to the most dramatic environmental changes in the Earth's history due to the catastrophic events, those are meteorite impact (Chicxulub) and supervolcano eruption (Deccan) occurring at the end of Cretaceous. The succeeding age was a time of rapid evolution of nannoplankton during Paleocene. A quantitative method analysis of nannoplankton throughout Maastrichtian to Paleocene of “P” well section, Santos Basin, Brazil, indicated that the nannoplankton assemblages abruptly decrease in diversity and abundance and mostly change in species composition. The various complex shapes of species at Maastrichtian also underwent changing to simple plain shapes and small at Paleocene. The sedimentary section ranges from the top of zone CC23 (Coccolith Cretaceous 23) to NP9 (Nannoplankton Paleogen 9). It is bounded by the Last Occurrence (LO) of Tranolithus pachelosus at the base and Fasciculithus tympaniformis at the top. The biostratigraphic discontinuity characterized by the absence of zone CC26 to NP4 is an indicator for the presence of an unconformity at K/T boundary within analyzed section. The Cretaceous nannoplankton assemblages are dominated by Genera Watznaueria, Micula, Arkhangelskiella, Cribrosphaerella, Eiffellithus, Predicosphaera, and Retecapsa, whilst the Paleocene assemblages are dominated by Genera Toweius, Ericsonia, and Coccolithus. Survivor Cretaceous species recovered into Tertiary sediments consist of Braarudosphaera bigelowii, Biscutum melaniae, Neocrepidolithus neocrassus, Placozygus sigmoides, Cyclagelosaphaera reinhardtii, Markalius inversus, and Scapolithus fossilis.<br /><br /></p> |
| first_indexed | 2024-12-10T19:58:12Z |
| format | Article |
| id | doaj.art-add15a3dda8340399f4e5957d11e9346 |
| institution | Directory Open Access Journal |
| issn | 2355-9314 2355-9306 |
| language | English |
| last_indexed | 2024-12-10T19:58:12Z |
| publishDate | 2014-06-01 |
| publisher | Geological Agency |
| record_format | Article |
| series | Indonesian Journal on Geoscience |
| spelling | doaj.art-add15a3dda8340399f4e5957d11e93462022-12-22T01:35:36ZengGeological AgencyIndonesian Journal on Geoscience2355-93142355-93062014-06-0161516810.17014/ijog.6.1.51-68115Nannoplankton Assemblage Succession Throughout Cretaceous/ Tertiary Boundary in the “P” Well Section, Santos Basin, BrazilPanuju Panuju0PPPTMGB “LEMIGAS” Jln. Ciledug Raya - Cipulir, Kebayoran Lama Jakarta Selatan - 12230<p>DOI: <span><a href="http://dx.doi.org/10.17014/ijog.v6i1.115" target="_blank">10.17014/ijog.v6i1.115</a></span></p><p>The massive change in calcareous nannoplankton assemblages throughout Cretaceous/Tertiary (K/T) boundary (65.5 M.a.) has been illustrated by several authors. The diverse and abundant assemblage disappears suddenly above the Cretaceous/Tertiary boundary. This event is related to the most dramatic environmental changes in the Earth's history due to the catastrophic events, those are meteorite impact (Chicxulub) and supervolcano eruption (Deccan) occurring at the end of Cretaceous. The succeeding age was a time of rapid evolution of nannoplankton during Paleocene. A quantitative method analysis of nannoplankton throughout Maastrichtian to Paleocene of “P” well section, Santos Basin, Brazil, indicated that the nannoplankton assemblages abruptly decrease in diversity and abundance and mostly change in species composition. The various complex shapes of species at Maastrichtian also underwent changing to simple plain shapes and small at Paleocene. The sedimentary section ranges from the top of zone CC23 (Coccolith Cretaceous 23) to NP9 (Nannoplankton Paleogen 9). It is bounded by the Last Occurrence (LO) of Tranolithus pachelosus at the base and Fasciculithus tympaniformis at the top. The biostratigraphic discontinuity characterized by the absence of zone CC26 to NP4 is an indicator for the presence of an unconformity at K/T boundary within analyzed section. The Cretaceous nannoplankton assemblages are dominated by Genera Watznaueria, Micula, Arkhangelskiella, Cribrosphaerella, Eiffellithus, Predicosphaera, and Retecapsa, whilst the Paleocene assemblages are dominated by Genera Toweius, Ericsonia, and Coccolithus. Survivor Cretaceous species recovered into Tertiary sediments consist of Braarudosphaera bigelowii, Biscutum melaniae, Neocrepidolithus neocrassus, Placozygus sigmoides, Cyclagelosaphaera reinhardtii, Markalius inversus, and Scapolithus fossilis.<br /><br /></p>https://ijog.geologi.esdm.go.id/index.php/IJOG/article/view/115biostratigraphynannoplanktonCretaceous/Tertiary (K/T) boundarySantos BasinBrazil |
| spellingShingle | Panuju Panuju Nannoplankton Assemblage Succession Throughout Cretaceous/ Tertiary Boundary in the “P” Well Section, Santos Basin, Brazil Indonesian Journal on Geoscience biostratigraphy nannoplankton Cretaceous/Tertiary (K/T) boundary Santos Basin Brazil |
| title | Nannoplankton Assemblage Succession Throughout Cretaceous/ Tertiary Boundary in the “P” Well Section, Santos Basin, Brazil |
| title_full | Nannoplankton Assemblage Succession Throughout Cretaceous/ Tertiary Boundary in the “P” Well Section, Santos Basin, Brazil |
| title_fullStr | Nannoplankton Assemblage Succession Throughout Cretaceous/ Tertiary Boundary in the “P” Well Section, Santos Basin, Brazil |
| title_full_unstemmed | Nannoplankton Assemblage Succession Throughout Cretaceous/ Tertiary Boundary in the “P” Well Section, Santos Basin, Brazil |
| title_short | Nannoplankton Assemblage Succession Throughout Cretaceous/ Tertiary Boundary in the “P” Well Section, Santos Basin, Brazil |
| title_sort | nannoplankton assemblage succession throughout cretaceous tertiary boundary in the p well section santos basin brazil |
| topic | biostratigraphy nannoplankton Cretaceous/Tertiary (K/T) boundary Santos Basin Brazil |
| url | https://ijog.geologi.esdm.go.id/index.php/IJOG/article/view/115 |
| work_keys_str_mv | AT panujupanuju nannoplanktonassemblagesuccessionthroughoutcretaceoustertiaryboundaryinthepwellsectionsantosbasinbrazil |