Granitic rocks in East Antarctica are weathered mainly by oxidation, forming goethite grains in veins due to thermal expansion and contraction. The weathered crust is softer than the core, with altered Fe-Ti oxide grains changing to hematite or ilmenite compounds. This study used petrological techniques to analyze the physical and chemical weathering of the rocks, revealing limited production of hydrous clay minerals in the area. The findings suggest that weathering in hyper-arid and hypothermal environments is controlled by various processes like frost shattering and salt fretting.