33. LATE CRETACEOUS TO PLEISTOCENE FORAMINIFERA FROM
to Pleistocene planktonic and benthonic foraminifera were in-vestigated from the recovered sediments. The Pliocene and Pleistocene assemblages yielded a nearly monospecific planktonic fauna of Neogloboquadrina pachyderma. Only a few, probably dis-placed, benthonic forms were found. The late and midd...
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| Format: | Text |
| Language: | English |
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.502.2388 http://www.deepseadrilling.org/35/volume/dsdp35_33.pdf |
| Summary: | to Pleistocene planktonic and benthonic foraminifera were in-vestigated from the recovered sediments. The Pliocene and Pleistocene assemblages yielded a nearly monospecific planktonic fauna of Neogloboquadrina pachyderma. Only a few, probably dis-placed, benthonic forms were found. The late and middle Miocene sediments were barren of foraminifera. A lower bathyal to abyssal fauna of arenaceous foraminifera existed throughout the region dur-ing the early Miocene. In the shallower continental slope area (Site 325) this fauna was accompanied by a sparse assemblage of deep-water calcareous benthonic species and an isolated occurrence of Globorotalia zealandica incognita. The age assignment of this species is foraminiferal Zone N6-N7; Burdigalian. The lower boundary of this fauna could be Oligocene, inasmuch as the observed benthonic species, especially Cyclammina, range from Oligocene to Miocene. A new fauna of arenaceous foraminifera, found only at Site 323 |
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