40. PALEONTOLOGY SYNTHESIS OF DEEP SEA DRILLING RESULTS FROM LEG 22 IN THE NORTHEASTERN INDIAN OCEAN
Of the several sites drilled during Leg 22, Site 214 is of special interest to biostratigraphers because this continu-ously cored section contains well-preserved siliceous and calcareous microfossils cooccurring over part of the cored interval. Planktonic foraminifera and calcareous nanno-fossils oc...
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| Format: | Text |
| Language: | English |
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.493.6559 http://www.deepseadrilling.org/22/volume/dsdp22_40.pdf |
| Summary: | Of the several sites drilled during Leg 22, Site 214 is of special interest to biostratigraphers because this continu-ously cored section contains well-preserved siliceous and calcareous microfossils cooccurring over part of the cored interval. Planktonic foraminifera and calcareous nanno-fossils occur from the Recent at the top of the hole down to Paleocene sediments. Progressively shallower facies towards the bottom of the hole, and possible hiatuses just above this shallow facies, make this portion of the section less useful than the middle Eocene to Recent interval. Nannofossils as well as planktonic foraminifera occur in normal succession above the middle Eocene, though some-what attenuated in the Eocene and Oligocene. Usable Radiolaria occur only from the middle Miocene up. Selected datum levels of the three microfossil groups as |
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