PREFACE

Integrated Ocean Drilling Program Expedition 306 is based on two separate proposals as follows:

(A) Proposal 572-Full3: "Ice sheet–ocean atmosphere interactions on millennial timescales during the late Neogene–Quaternary using a paleointensity-assisted chronology for the North Atlantic" and

(B) Proposal 543-Full2: "Installation of a CORK (circulation obviation retrofit kit) near Hole 642E to document and monitor bottom water temperature variations through time."

Because both parts are independent of each other, the introductory chapters of the Expedition 306 Preliminary Report (Introduction, Background, Geological Setting, and Objectives) have been divided into Part A and Part B. Sites U1312, U1313, and U1314 are related to the North Atlantic paleoceanography study (Part A), whereas Site U1315 and the revisited Ocean Drilling Program Hole 642E are related to the CORK program (Part B).