Neogene Foraminifera from the Northeastern Pacific Ocean, Leg 18, Deep Sea Drilling Project

Abstract

Introduction General Methods and procedures Site 172 Geologic and stratigraphic setting Planktonic foraminifera and age Benthonic foraminifera Origin of lower Oligocene carbonate ooze Site 173 Geologic and stratigraphic setting Abundance and preservation of foraminifera Planktonic foraminifera Age, biostratigraphy, and paleo-oceanography Benthonic foraminifera and paleobathymetry Site 174 Geologic and stratigraphic setting Abundance and preservation of foraminifera Planktonic foraminifera, age, and paleo-oceanography Benthonic foraminifera and paleobathymetry Site 175 Geologic and stratigraphic setting Abundance and preservation of foraminifera Planktonic foraminifera, age, and paleo-oceanography Benthonic foraminifera aad paleobathymetry Site 176 Geologic and stratigraphic setting Abundance and preservation of foraminifera Planktonic foraminifera, age, and paleo-oceanography Benthonic foraminifera and paleobathymetry Site 177 Geologic and stratigraphic setting Abundance and preservation of foraminifera CONTENTS

Neogene Benthonic Foraminifera from Site 369, Leg 41, Deep Sea Drilling Project

“…Figure 7 shows that most species have rather extended ranges. Comparable results are given for the Pacific by Douglas (1973), Ingle (1973), and Parker (1964).…”

“…In general, the species composition of the Neogene benthonic population is similar to that described by Cushman (1929) from the oceanic Miocene of Venezuela and Trinidad. Most of the Neogene species recorded by Douglas (1973) and Ingle (1973) from lower middle bathyal depths of the northern Pacific are also present at Site 369. This wide interocean distribution of bathyal Neogene foraminifera should stimulate future correlation studies with benthonic foraminifera.…”

“…which might be potentially useful for biostratigraphy. These problems have been given too little attention, as pointed out by Ingle (1973), and more detailed studies, including biometric analyses, are called for to increase the biostratigraphical usefulness of these foraminifers.…”

Introduction and Explanatory Notes

“…This zonation is discussed by Hedgepeth (1957) and Ingle (1973). Unfortunately, the Mediterranean Sea is topographically and hydrographically unlike the open ocean basins of the world.…”

Site 297

“…Several recent studies (Kent et al, 1971;Hays et al, 1969;Ingle, 1973) of Pleistocene climatic events in the North Pacific have found substantial evidence of a major climatic cooling beginning about 700,000 2 years B.P. which is now recognized as the initiation of the so-called glacial Pleistocene.…”