Several major stratigraphic boundaries recovered during Leg 171B. A. Close-up of the K/T boundary in Hole 1049A showing the spherule bed and light gray sediment of early Paleocene age. B. Close-up of black shale in Hole 1049A. The black shale is of early Albian age and is probably time equivalent with Oceanic Anoxic Event 1b. C. Hardground composed of phosphatic concretions with borings separating sediments of Campanian age (above) and Santonian age (below), from Hole 1050C.