Micropaleontology of a Miocene Core from the Western Tropical Pacific

Abstract

In January 1968, members of the Hawaii Institute of Geophysics recovered a sediment core (S67-31) 110 cm long from the western tropical Pacific at 05°03.5'N, 166°56.2'E (Fig. 1). The sediment was cored by free-fall device in a water depth of 4,795 meters. This corer caused relatively little disturbance to the sedimentary layers of the core, which consist of thin Quaternary deposits overlying Miocene with well-preserved radiolarian assemblages. The microfaunal sequence is documented herein.