Calcareous nannofossils from ODP Leg 105 holes

Neogene calcareous nannofossils were examined from 10 holes at three sites cored during ODP Leg 105. Sediment recovered in Baffin Bay at Site 645 is virtually barren of calcareous nannofossils, with the exception of a sparse lower Miocene assemblage. Sites 646 and 647 in the Labrador Sea contain upp...

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Bibliographic Details
Main Authors: Knüttel, Stephen, Russell, Merlin D Jr, Firth, John V
Format: Dataset
Language:English
Published: PANGAEA 1989
Subjects:
105-646A
105-646B
105-647A
DRILL
Drilling/drill rig
Joides Resolution
Labrador Sea
Leg105
North Atlantic Ocean
Ocean Drilling Program
ODP
Baffin Bay
Baffin
North Atlantic
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.744869
https://doi.org/10.1594/PANGAEA.744869
Description
Summary:Neogene calcareous nannofossils were examined from 10 holes at three sites cored during ODP Leg 105. Sediment recovered in Baffin Bay at Site 645 is virtually barren of calcareous nannofossils, with the exception of a sparse lower Miocene assemblage. Sites 646 and 647 in the Labrador Sea contain upper Miocene to Holocene sediments having numerous barren intervals. Upper Pleistocene fossil coccolithophorid floras in the Labrador Sea indicate alternations of cold subpolar with transitional (subpolar/subtropical) assemblages. Extreme variations in the abundance of Coccolithus pelagicus were observed at Sites 646 and 647. These variations are correlated with stable isotopic data to interpret oceanographic responses to warming and cooling trends. The climatic history indicated by the changes of these assemblages closely approximates the past climatic fluctuations recorded in other North Atlantic cores. One new taxon, Discoaster bergenii, is described.

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