Abstract
Marginal seas of Eastern Asia which form a transition zone from the continent to the Pacific are considered from new positions: as a system of gigantic morpho-structures of the central type (mega-MCT). The main features of geological and geomorphological patterns and evolution of megastructures in question have been identified. The formation of the recent geomorphological image of marginal mega-MCT occurred in Mesozoic (mainly in Late Mesozoic)-Cenozoic under the conditions of continuous extension of the earth's crust over the whole western Pacific margin.
