Diatom stratigraphy of ODP Leg 150 holes

Diatoms are present in middle to lower upper Miocene sections of all holes examined during Leg 150, but are generally absent or in low abundance in Pleistocene to middle upper Miocene sediments. An exception is the alternating diatom-rich, diatom-poor intervals in upper Quaternary sediments. Five ne...

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Bibliographic Details
Main Author: Burckle, Lloyd H
Format: Dataset
Language:English
Published: PANGAEA 1996
Subjects:
150-902D
150-903A
150-906A
DRILL
Drilling/drill rig
Joides Resolution
Leg150
North Atlantic Ocean
Ocean Drilling Program
ODP
North Atlantic
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.761589
https://doi.org/10.1594/PANGAEA.761589
Description
Summary:Diatoms are present in middle to lower upper Miocene sections of all holes examined during Leg 150, but are generally absent or in low abundance in Pleistocene to middle upper Miocene sediments. An exception is the alternating diatom-rich, diatom-poor intervals in upper Quaternary sediments. Five new diatom zones, covering an interval from near the lower/middle Miocene boundary to the lower upper Miocene, are proposed. Some of the taxon used to define these zones are also used in zonal schemes for the East Coast of the United States, and allow for correlations to be drawn between this region and Leg 150 sites. Lower Miocene and older levels are not included in this study. Although older Tertiary diatoms are present at some of the sites, dissolution has largely compromised their usefulness as zonal markers.

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