Miocene to Pliocene calcareous nannofossil biostratigraphy at ODP Leg 117 Sites 1088 and 1090, Southern Ocean ...
The calcareous nannofossil biostratigraphy of ODP Leg 177 Sites 1088 and 1090 (Subantarctic sector from the Atlantic Ocean) is discussed. Most nannofossil zonal boundaries of Martini (1971) and Okada and Bukry (1980) were recognized for the studied mid-high-latitude sediments. Conventional low-latit...
| Main Authors: | , |
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| Format: | Article in Journal/Newspaper |
| Language: | English |
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PANGAEA
2002
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| Online Access: | https://dx.doi.org/10.1594/pangaea.685598 https://doi.pangaea.de/10.1594/PANGAEA.685598 |
| Summary: | The calcareous nannofossil biostratigraphy of ODP Leg 177 Sites 1088 and 1090 (Subantarctic sector from the Atlantic Ocean) is discussed. Most nannofossil zonal boundaries of Martini (1971) and Okada and Bukry (1980) were recognized for the studied mid-high-latitude sediments. Conventional low-latitude marker species such as Amaurolithus spp., Discoaster spp., Triquetrorhabdulus spp., Ceratolithus spp. were recorded as rare and scattered, which impeded the development of a detailed nannofossil biostratigraphic zonation of some Miocene and Pliocene intervals. Because of the absence of some primary biostratigraphic marker species, additional second-order bioevents, such as the first occurrence of Calcidiscus macintyrei and the last occurrence of Coccolithus miopelagicus, have been used to approximate the base of zones NN7 and NN8, respectively. Several disconformities disturbing the Pliocene and Miocene intervals of Site 1090 could be determined based on nannofossil distribution although the occurrence of ... : Supplement to: Marino, Maria; Flores, José-Abel (2002): Miocene to Pliocene calcareous nannofossil biostratigraphy at ODP Leg 177 Sites 1088 and 1090. Marine Micropaleontology, 45(3-4), 291-307 ... |
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