ニュージーランドの地形の二・三の問題 : ウェリントン付近を中心として
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概要
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Wellington Fault belongs to the major fault belt which extends NE-SW through New Zealand, Namely, Alpine Fault of South Island extends along the northwestern side of the Southern Alps and the fault branches at the north end of the South Island into the Wangamoa, Wairau, Awatere, Clarence, Kekerengu, Hop-kaikoura and Port Pass Faults. And so, the Weillington Fault is regarded as the continuation of the Awatere Fault, and the Wairarapa Fault is regarded as the continuation of the Kekerengu Fault. These faults are mostly active and even in the historic past of 120 years, numerous earthquakes took place associated with crustal deformations. Wellington Fault has a boldly defined, fairly straight course and can readily be traced north-east for 150 miles from Cook Strait through Wellington City and along the west of the Wellington Harbour and Hutt Valley. Wellington Fault is a clockwise transcurrent fault and upthrow of the crustal blocks bordering this fault has raised the hill country to the west of it, while downthrow and buckling of the land to the east has helped to form the Port Nicholson and Hutt Valley depressions. At the upper levels of the western side of Wellington City, there are remains of Peneplains which are called the K Surface by C. A. Cotton. Perhaps the K Surface can be classified into some surfaces.<BR>The periglacial deposits were found by C. A. Cotton and M. T. Te Punga for the first time at Wellington. The periglacial deposits of the South Island in New Zealand were found by Jane Soons, Mr. Brockie and others.<BR>Two periglacial deposits-stratified scree and stratified solifluction tongue-were classified by Jane M. Soons in South Island. But, there are many problems on the periglacial geomorphology in New Zealand.
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