S.P. Pletnev, M.E. Melnikov, T.A. Punina, Y.D. Zaharov. AGE AND PALEOGEOGRAPHIC STAGES OF DEVELOPMENT GUYOT OF MAGELLAN SEAMOUNTS (PACIFIC OCEAN)

S.P. Pletnev 1, M.E. Melnikov 2, T.A. Punina 3, Y.D. Zaharov 3
1 Pacific Oceanological Institute, Far East Branch, Russian Academy of Sciences, Vladivostok
2 Yuzhmorgeologiya, Gelendzhik
3 Far Eastern Geological Institute, Far East Branch, Russian Academy of Sciences, Vladivostok
AGE AND PALEOGEOGRAPHIC STAGES OF DEVELOPMENT GUYOT OF MAGELLAN SEAMOUNTS (PACIFIC OCEAN)
Expeditionary investigations carried out by GKС «Yuzmorgeologiya» in 2000—2010 i.e. in the Pacific Ocean on board R/V «Gelendzhik» resulted in new materials that made it possible to revel the features of morphological structure of Magellan seamounts and to elucidate the matter and paleontological character of the structural-formation complexes of rocks from Early Cretaceous to Pleistocene inclusive. Anylysis of macro- and microfauna in sedimentary rocks allowed us to distinguish the «transgressive» phases in development of the Guyot: Cenomanian-Turonian, Late Campanian@Maastrichtion, Late Paleocen-Middle Eocene and Late Cenozoic. There is Oligocene hiatus in all guyots of the Magellan Seamounts.
Key words: Magellan seamounts, stages of development, structuralformation levels, bio-litho-stratigraphic sequence.
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