M.S. Barash, V.M. Lavrov EOCENE OUTCROPS IN THE EQUATORIAL PART OF THE MID-ATLANTIC RIDGE AND THEIR TECTONIC SIGNIFICANCE The results of the biostratigraphic studies of limestone sampled in the central part of the MidAtlantic Ridge are discussed. Based on the planktonic foraminiferal fauna, the age of the rocks is established to be middle Eocene. A relationship is shown to exist between the ... [Show full abstract] Eocene outcrops and the structural peculiarities. The Eocene outcrops are supposed either to be related to the nonspreading crustal blocks or to bear witness to the manifestations there of Cenozoic tectonic stages.