by the combination of tectonic coastal uplift and quaternary sea-level fluctuations. The Saruwaged massif, with its twin peaks of Bangeta and Saruwaged, dominate the Saruwaged Range; rugged and steep, the massif reaches , and is surrounded by jungles at its base. Indigenous population Near Mount Hagen, archaeologists have identified the Kuk Swamp (), one of the oldest agricultural drainage sites in Australasia; the site has been identified as a UNESCO site, and is on the list of recommended World Heritage sites. Linguistic features suggest the origins of the population. Along the southeast coast and in the Markham Valley, the Austronesia family of languages predominate. The two main languages were Kâte and Yabim, with Kâte spoken in the mountainous hinterlands and Yabim on the coastal areas, particularly on coast of the Huon Peninsula. The Non-Austronesia languages are heard most commonly in the mountain regions. See also Prefecture Apostolic of Kaiserwilhelmsland Dutch New Guinea Unserdeutsch language Citations External links Prefecture Apostolic of Kaiserwilhelmsland – Catholic Encyclopedia article History of Papua New Guinea German New Guinea Christian missions in Oceania Former protectorates Morobe Province Lae 1884 establishments in German New Guinea 1919 disestablishments in German New Guinea