Cretaceous to Quaternary planktonic foraminifera in ODP Leg 149 holes

This paper presents the results of a biostratigraphic analysis, based on planktonic foraminifers, of Ocean Drilling Program Leg 149 Sites 897- 900 in the Iberia Abyssal Plain, off the coast of Portugal. Dissolution and changes in water-mass temperatures affect the quality of biozonation in some leve...

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Bibliographic Details
Main Author: Gervais, Elisabeth
Format: Dataset
Language:English
Published: PANGAEA 1996
Subjects:
149-897A
149-897C
149-897D
149-898A
149-899A
149-899B
149-900A
DRILL
Drilling/drill rig
Joides Resolution
Leg149
North Atlantic Ocean
Ocean Drilling Program
ODP
North Atlantic
Planktonic foraminifera
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.761652
https://doi.org/10.1594/PANGAEA.761652
Description
Summary:This paper presents the results of a biostratigraphic analysis, based on planktonic foraminifers, of Ocean Drilling Program Leg 149 Sites 897- 900 in the Iberia Abyssal Plain, off the coast of Portugal. Dissolution and changes in water-mass temperatures affect the quality of biozonation in some levels of the Pliocene, Miocene, and Paleocene/lower Eocene. Important hiatuses occur in the upper Cretaceous, Paleocene to middle/lower upper? Eocene and uppermost middle to lower upper Miocene in all the sites studied. A major hiatus in Hole 898A, spanning the Pliocene, late Miocene and the latest part of the middle Miocene, could be caused by erosion triggered by climatic cooling and/or erosion connected with middle-late Miocene local tectonic activity.

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