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Site 396 is located on the eastern flank of the Mid-Atlantic Ridge, in the tropical area of the Atlantic Ocean. The drilling by Glomar Challenger in this region was started on Leg 45. Hole 396 (22°58.88'N, 43°30.95'W; 4450 m water depth) penetrated 125 meters of middle Miocene-Quaternary nannofossil foraminiferal oozes and 96 meters of basalts. The drilling was continued on Leg 46, with two additional holes drilled slightly to the north (22°59.14'N, 43°30.90'W, 4459 m water depth). Hole 396A penetrated the sedimentary cover, but only two cores of Quaternary sediments (within the 0 to 19-meter interval) were taken. Hole 396B penetrated 150.5 meters of nannofossil foraminiferal ooze and 256 meters of basalts; three cores of lower Pliocene sediments were taken (122.0 to 150.5 m sub-bottom). The stratigraphic subdivision of Miocene, Pliocene, and Quaternary sediments by means of planktonic foraminifers in Hole 396 was given in the Initial Reports of the DSDP, Leg 45 (Krasheninnikov, 1978). This article summarizes very briefly all the stratigraphic data obtained for Holes 396, 396A, and 396B; the general idea about the main features of microfauna, the character of sediments, and a comparison with the Pliocene-Quaternary section of Site 395 on the west flank of the Mid-Atlantic Ridge are given as well.

Stratigraphy and Planktonic Foraminifers of Neogene and Quaternary Sediments of Site 396, Leg 46 of DSDP