Data report: calcareous nannofossils from upper Pliocene and Pleistocene, Expedition 306 Sites U1313 and U1314

Abstract

Integrated Ocean Drilling Program Expedition 306 recovered expanded Pliocene?Pleistocene sections at two sites in the North Atlantic. Site U1313 was drilled on the western flank of the Mid-Atlantic Ridge northwest of the Azores, whereas Site U1314 was drilled on the southern Gardar Drift. Calcareous nannofossils from both sites are abundant and moderately to well preserved in the upper Pliocene and Pleistocene. The assemblages are dominated by gephyrocapsids and reticulofenestrids. Biostratigraphic analysis of the upper 158 meters composite depth (mcd) of Site U1313 yields a complete succession of nannofossil datums spanning the last 3 m.y. Site U1314, which had higher sedimentation rates during the Pleistocene, spans the last 1 m.y. in the upper 96 mcd.