Abstract

The topography of coastal areas in Quảng Ngãi - Quy Nhơn is classified from tectonic-geomorphology point of view. Genesis creating terrains was analyzed in order to indừectly detect tectonic activity. According to research data, they are divided into 06 groups of genesis as follows: Topography due to volcanic activity; The topography due to denudation activity; The topography due to the river activity; The topography due to the sea activity; Topography due to mixed sea-river activity; The terrain due to human activities. Apart from volcanic activity that is directly endogenous movement, other activities is of exogenous movement, however following indirect movements reflect endogenous impact on the terrain: leveled surfaces, surface of river shelf, seabed, or a mixture of river-sea sediments. And they are fragmentated, displacemented and distributed at different heights. The morphology of coastline is consisted in 3 types: corroded coasline, accumulated coastline; and eroded coastline. They are not only influenced by exogenous activity but also by the endogenous activity in the Neotectonic period and Active tectonic.