The two island groups are the peaks of an undersea mountain range , raised by the scraping up of soft sediments as the plate ' s leading edge pressed down and forward against the india plate 这两个群岛是海底山脉的山峰，它们是缅甸板块挤压印度板块时，缅甸板块前端下沉至印度板块下方，并持续向前推进，其前沿的软质沉积物被刮起、逐渐累积而成。
