Abstract Lanshu and Lutao are the north segment of the Luzon Arc. Marine terraces are well developed on these two volcanic islands. Using the spatial distribution of the present heights at the inner margin of marine terraces, and correlating them with the global marine terrace correlation basic map , the uplift rates of these two islands are 2.16 m/ka and 1.55 m/ka respectively, and the formed ages of marine terraces are also deduced. The features of marine terraces are influenced by uplift rates of crustal movement. The uplift rate of Lanshu is greater than that of Lutao so that Lanshu possesses higher altitude, more steps of terrace and larger scarps, but narrower terrace surfaces. The height and interval spatial pattern of marine terraces in Lanshu and Lutao are well responsed to the uplift rates and related to the high stands of sea-level variation, it appears that the formation of flights of marine terraces is not caused by an intermittent large-scale land uplift, but rather by a combination of linear uplift in the long term together with eustatic sea-level change. Observing from altitude distribution and surface deformation of marine terraces, no obviously tilted structure is found but some faults can be drawn out. They are Hungtou Cape and Lungmen faults in Lanshu, Chungliao and Paisha faults in Lutao. All of them have a strike of NW to SE in direction. Most of the uplifted walls are on the west, and one of them has dextral separation characteristics. Those features of faults are caused by the release of compressional stress that has been produced by the Luzon Arc of Philippine Sea Plat which is drifting to NW ward. The uplift rate of Lutao is rather different and smaller than that of Lanshu, it implies that they are separated uplifting fault blocks and the crustal movement become more gentle at north part of the Luzon Arc when it collides with the Taiwan island.
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