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MAIN TYPES OF PALEOGENE SEDIMENTARY ROCKS AND CONDITION OF THEIR FORMATION ON THE GUYOTS OF THE MAGELLAN SEAMOUNTS (PACIFIC OCEAN)

The Paleocene-Eocene sedimentary complex is most widely developed among the sedimentary cover sediments of the Magellan Seamounts. It is made up of pelagic (nanoforaminiferal) and reef limestones, edaphogenic breccias and volcanoclastic rocks. The most widespread pelagic limestones form narrow (0.5–1.5 km) and extensive (up to 20 km) ribbon-like bodies which cover the upper parts of the slopes and the rim of the summit plateau. The maximum area of their development is marked on Fyodorov Guyot – 315 km2. Pelagic limestones and edaphogenic breccias are exposed over large areas and have mutual facies transitions. The Oligocene hiatus in sedimentation was established in the sections of the Cenozoic sedimentary cover deposits of the studied guyots.