old in the south (Guam). The islands are formed as the highly dense and very old western edge of the Pacific plate plunges downward to form the floor of the Mariana Trench and carries trapped water under the Mariana plate as it does so. This water is super-heated as the plate is carried farther downward and results in the volcanic activity which has formed the arc of Mariana Islands above this subduction region. The Mariana Islands were the first islands settled by humans in Remote Oceania. Incidentally it is also the first and the longest of the ocean-crossing voyages of the Austronesian peoples into Remote Oceania, and is separate from the later Polynesian settlement of the rest of Remote Oceania. They were first settled around 1500 to 1400 BCE by migrants departing from the Philippines. Archeological studies of human activity on the islands has revealed potteries with red-slipped, circle-stamped and punctate-stamped designs found in the Mariana Islands dating between 1500 and 1400 BC. These artifacts show similar aesthetics to pottery found in Northern and Central Philippines, the Nagsabaran (Cagayan Valley) pottery, which flourished during the period between 2000 and 1300 BC. Comparative and historical linguistics also indicate that the Chamorro language is most closely related to the Philippine subfamily of the Austronesian languages, instead of the Oceanic subfamily of the languages of the rest of Remote Oceania. Mitochondrial DNA and whole genome sequencing of the Chamorro people strongly support an ancestry from the Philippines. Genetic analysis of pre-Latte period skeletons in Guam also show that they do not have Australo-Melanesian ("Papuan") ancestry which rules out origins from the Bismarck Archipelago, New Guinea, or eastern Indonesia. The Lapita culture itself (the ancestral branch of the Polynesian migrations) is younger than the first settlement of the Marianas (the earliest Lapita artifacts are dated to around 1350 to 1300 BCE), indicating that they originated from separate migration voyages. Nevertheless, DNA analysis also show close genetic relationship between ancient settlers of the Marianas and early Lapita settlers in the Bismarck Archipelago. This may indicate that both the Lapita culture and the Marianas were settled from direct migrations from the Philippines, or that early settlers from the Marianas voyaged further southwards into the Bismarcks and reconnected with the Lapita people. The Marianas also later established contact and received migrations from the Caroline Islands at around the first millennium CE. This brought new pottery styles, language,