(Table 1) Radiocarbon ages of foraminifera from a Piston and a Trigger Weight from Ceara Rise
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| Natura: | Dataset Open Access |
| Lingua: | en |
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PANGAEA
1999
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| _version_ | 1867171838152409088 |
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| author | Broecker, Wallace S Matsumoto, Katsumi Clark, Elizabeth |
| author_facet | Broecker, Wallace S Matsumoto, Katsumi Clark, Elizabeth |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Radiocarbon-age measurements on single species of foraminifera from a core on the Ceara Rise demonstrate the importance of the joint effect of bioturbation and variable rain abundance of foraminifera. The relatively high mixed layer ages for Pulleniatina obliquiloculata reflect, at least in part, an early Holocene peak in its abundance while the relatively young ages for Globorotalia menardii reflect the delay until mid Holocene of its reappearance in the Atlantic Ocean. These results clearly demonstrate that core-top sediment samples need not be representative foraminifera falling from today's surface ocean. Rather, at least on the Ceara Rise, such samples consist of a composite of changing species groupings. These results also reconfirm the pitfalls associated with attempts to reconstruct the radiocarbon age of deep ocean water on the basis of benthic-planktonic foraminiferal age differences. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_856705 |
| institution | PANGAEA |
| language | en |
| publishDate | 1999 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | (Table 1) Radiocarbon ages of foraminifera from a Piston and a Trigger Weight from Ceara Rise Broecker, Wallace S Matsumoto, Katsumi Clark, Elizabeth Age, 14C milieu/reservoir corrected (-400 yr); Age, 14C milieu/reservoir corrected (-800 yr); Age, dated; Ceara_Rise; Ceara Rise; Core; DEPTH, sediment/rock; Foraminifera, benthic; Globigerinoides sacculifer; Globorotalia menardii; Neogloboquadrina dutertrei; Pulleniatina obliquiloculata Radiocarbon-age measurements on single species of foraminifera from a core on the Ceara Rise demonstrate the importance of the joint effect of bioturbation and variable rain abundance of foraminifera. The relatively high mixed layer ages for Pulleniatina obliquiloculata reflect, at least in part, an early Holocene peak in its abundance while the relatively young ages for Globorotalia menardii reflect the delay until mid Holocene of its reappearance in the Atlantic Ocean. These results clearly demonstrate that core-top sediment samples need not be representative foraminifera falling from today's surface ocean. Rather, at least on the Ceara Rise, such samples consist of a composite of changing species groupings. These results also reconfirm the pitfalls associated with attempts to reconstruct the radiocarbon age of deep ocean water on the basis of benthic-planktonic foraminiferal age differences. |
| title | (Table 1) Radiocarbon ages of foraminifera from a Piston and a Trigger Weight from Ceara Rise |
| topic | Age, 14C milieu/reservoir corrected (-400 yr); Age, 14C milieu/reservoir corrected (-800 yr); Age, dated; Ceara_Rise; Ceara Rise; Core; DEPTH, sediment/rock; Foraminifera, benthic; Globigerinoides sacculifer; Globorotalia menardii; Neogloboquadrina dutertrei; Pulleniatina obliquiloculata |
| url | https://doi.org/10.1594/PANGAEA.856705 |