By means of the analysis of many boring cores collected by the Authority of Nagoya Port, the authors studied the geology and stratigraphy of recent alluvial deposits and made clear the buried topography beneath the southern part of the Nobi Plain. As a result, following conclusions were induced.
The basal topography beneath the recent alluvial deposits is classified into four buried geomorphological surfaces in descending order, 1) the buried wave-cut platform (shallower than -15m), 2) the buried surface of the Atsuta terrace, 3) the buried surface of the Toriimatsu terrace and 4) the buried valley bed. Recent alluvial materials upon the basal gravel beds are divided into four beds in acending order, 1) the Lower Sands, 2) the Middle Muds, 3) the Upper Sands and 4) the Top Muds, The Lower Sands (a so-called Nobi Formation) were deposited in the late glacial time as the foreset bed of delta, their ages are about 18, 000 to 13, 000y.B.P, by ¹⁴C dating. The Middle Muds (20 to 10m thick) were deposited as the bottomset bed of delta in the extended Ise Bay of the Holocene transgression time and their ¹⁴C dating ages are about from 9000 to 5000y.B.P. containing the Akahoya volcanic ash layer (Ah). The Upper sands were deposited as progressing foreset bed of delta after the age of the maximum sea level of Holocene transgression. The age of this deposition around the Nagoya harbour is 2500 or 2000y.B.P. The Top Muds along the coastal district are the artificial earth materials on reclaimed lands.

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The vertical movements of the land around the Bay of Ise are discussed not only by using the results of the precise levellings during 75 years from 1.885 to 1960, but also by the data of sea levels at mareograph stations. The yearly changes of land levels are of the order of centimeter and the greater part of the land in this region tends to subside. The rate of subsidence seems to increase with year. The largest amount of subsidence since 1885 is found to be in the area between the rivers of Kiso and Nikko, i.e. B.M. 1473, whereas the largest rate of subsidence during recent years is not appeared at B.M. 1473 but B.M. 1474-1475 and B.M. 1470. Further, the secondary variation of vertical land movements takes an undulatory form. This secondary undulatory movement is overlapping to the foundamental subsidence. The vertical earth movements are related to the geologic structure in this area.

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標準貫入試験をともなう100本以上の試錐をもとにしたわれわれの研究により,濃尾平野海岸地帯の冲積層の下には3段の侵蝕面のあることがわかつた.(1)現海面下0～10mにある上位面は,濃尾平野の南東部にみられる.この面は冲積世中期以後に形成された海蝕棚と思われる.(2)地表面下20～30mにある中位面は,海面が現在のそれより約40m低位にあつた洪積世後期に,河川侵蝕により形成されたものと思われる.(3)下底面は同平野の西部にみられ,現海面下40～55mにある.この面は,最終氷期の最低位海面時における,冲積世前木曽川穿入谷の谷底である.
濃尾平野における上記の埋没地形は,京浜地方および浜松地方におけるそれと一致し,またH. N. Fiskが研究したミシシツピー下流部冲積谷とも非常によく似ている.
これらの地域における地形の類似性は,それらの地形が洪積世後期ないしはその後における海面の変動に制約されていることを暗示している.これらの地形の存在は,洪積世後期における海面が次のような過程で変化したことを示したことを示している.(1) 洪積世の高位海面期後,海面は現海面下30～40mの深さまで低下した(A期).(2) つぎに洪積世後期の最低水準まで,海面はふたたび低下した(B期).
埋没支谷の上流部まで回春がおよばなかつたことからみて,穿入谷の存続期間は比較的短期間に限られていたことは明らかである。A期はB期より短かかつたと思われる.

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A spring constant of railway vehicle is deteriorated as operated either since newly built or lately inspected. The existing system to detect the deterioration of coil springs for railway vehicles depends on periodical inspections at factories away from operational rail tracks. It is costly and time consuming work. In this respect, this paper applies the theory of detecting 3-D locations of the center of gravity for detecting the deterioration of coil springs for railway vehicles, which was invented by the second author of this paper and abbreviated as D3DCG. D3DCG can detect not only the center of gravity of railway vehicles but also the lower limit of unstable zone for the center of gravity by which the deterioration of cars underneath the vehicle can be measured on the moving vehicle. In order to apply D3DCG, the authors measured the vertical acceleration and the roll rate of moving railway vehicles commercially operated and was successfully able to find that the lower limit of unstable zone decreased according to operational years of the car since newly built or lately inspected.

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