Palaeontologia Electronica palaeo-electronica.org Neogene benthic foraminifera from the southern Bering Sea (IODP Expedition 323) Eiichi Setoyama and Michael A. Kaminski ABSTRACT This study describes a total of 95 calcareous benthic foraminiferal taxa from the Pliocene–Pleistocene recovered from IODP Hole U1341B in the southern Bering Sea with illustrations produced with an optical microscope and SEM. The benthic foramin- iferal assemblages are mostly dominated by calcareous taxa, and poorly diversified agglutinated forms are rare or often absent, comprising only minor components. Elon- gate, tapered, and/or flattened planispiral infaunal morphotypes are common or domi- nate the assemblages reflecting the persistent high-productivity and hypoxic conditions in the deep Bering Sea. Most of the species found in the cores are long-ranging, but we observe the extinction of several cylindrical forms that disappeared during the mid- Pleistocene Climatic Transition. Eiichi Setoyama. Earth Sciences Department, Research Group of Reservoir Characterization, King Fahd University of Petroleum & Minerals, Dhahran, 31261, Saudi Arabia current address: Energy & Geoscience Institute, University of Utah, 423 Wakara Way, Suite 300, Salt Lake City, Utah 84108, USA
[email protected] Michael A. Kaminski. Earth Sciences Department, Research Group of Reservoir Characterization, King Fahd University of Petroleum & Minerals, Dhahran, 31261, Saudi Arabia
[email protected] Keywords: Bering Sea; biostratigraphy; foraminifera; palaeoceanography; Pliocene-Pleistocene; taxonomy Submission: 19 February 2014. Acceptance: 1 July 2015 INTRODUCTION the foraminiferal assemblages and palaeoceano- graphic proxies in continuously-cored sections in The Bering Sea is a large, permanently the deeper, southern part of the Bering Sea, with hypoxic deep basin that has a well-developed oxy- an aim toward assessing the effects of climate gen-minimum zone (Takahashi et al., 2011).