Journal of Geography (Chigaku Zasshi)
Online ISSN : 1884-0884
Print ISSN : 0022-135X
ISSN-L : 0022-135X
Volume 86 , Issue 2
Showing 1-8 articles out of 8 articles from the selected issue
  • Shigemoto TOKUNAGA, Hideaki OSHIMA, Yoshinaga ITO
    1977 Volume 86 Issue 2 Pages 73-79
    Published: April 25, 1977
    Released: November 12, 2009
    JOURNALS FREE ACCESS
    The pollen stratigraphy is a part of paleopalynology. The pollen stratigraphy of Tertiary, Quaternary and Mesozoic are not yet completed in Japan.
    The oldest fossil spores have been found from the Permian of Kyoto prefecture. The good pollen assemblages have been found over lower Cretaceous, but well preserved Cretaceous specimens is limited to the Hokkaido and northern areas of Tohoku district.
    The many Tertiary pollen and spore assemblages have been found from many places through Japan.
    In the beginning of pollen analysis in Japan, analysis of lignite and coal was commenced, but now the good samples for analysis are clay, silt and others.
    The valuable fossil pollen and spores for correlation are the warm-temperate flora in the northern part of Japan and the cool-temperate species is important in the southern part of Japan.
    In the Okinawa-Taiwan area, the pollen of southern conifer, for example Dacrydium and Phyllocladus, are important for palynological correlation, and also in the south-east Asia, Rhizophora and Sonneratia are remarkable.
    The problems in the palynological correlation are the recognition of derived fossils and the mechanism of transportation of pollen and spore.
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  • Eiichi HONZA, Hideo KAGAMI
    1977 Volume 86 Issue 2 Pages 80-91
    Published: April 25, 1977
    Released: February 25, 2010
    JOURNALS FREE ACCESS
  • Hiroyuki MATSUDA, Seiichi HATANO, Yoshihisa HOSHINO
    1977 Volume 86 Issue 2 Pages 92-109
    Published: April 25, 1977
    Released: February 25, 2010
    JOURNALS FREE ACCESS
    The purpose of this study is to obtain the fundamental data for the inland earthquake in the upper part of the crust and for the reasonable landuse plan in Tokyo Metropolitan District. This study was carried out by air-photo-interpretation and field observation.
    In the photo-interpretation, attention was paid to the geomorphological peculiarity such as systematical pattern of lineaments, difference of height and inclination between both side of the fault line, shutter ridge and off-set valley, mound and trench, sag pond and its burried type, terminal facet, kerncol, fault scarplet, etc. Active faults were recognized from the facts that terraces and alluvial landforms along the fault lines are deformed by fault action, or fault planes are observed in the Quaternary bed.
    The result of the photo-interpretation and the field observation is compiled of Fig. 1, in which the thick lines mean the active faults and the others are the faults not yet recongnized as the active ones. The active faults which were newly found by the authors are as follows :
    Length Strike Vertical disp.(down) Horizontal disp.
    1. TACHIKAWA F. 32km N 40°W SW left (?)
    2. OGOSE F. 16km N 25°W E -
    3. ENAMI F. 10km N 33°W SW -
    4. ISOBE F. 5km N 35°W SW -
    5. OKUBO F: 7km N 70°W SW -
    6. KAJIYADO F. 5km N 50°W SW left
    7. KOTESASHI F. 20km N 57°E N -
    8. AGAKUNI F. 14km N 90°E N right
    9. TAKAMINE F. 5km N 51°E SE -
    Of above active faults, the some parts of fault plane were observed geologically at several outcrops along TACHIKAWA F. (Photo 1, 2), OGOSE F. and OKUBO F. (Photo 6). Besides, the authors also observed the fault planes along FUKAYA F. (Photo 3, 4) and HIRAI F. (Photo 5), which had been already reported as the active faults by T. Matsuda from the geomorphological points in 1975. These newly observed faults are almost all reverse fault or thrust.
    The synoptical distribution pattern of the tectonical lineaments in Kanto Plain and its surrounding area is as seen from Fig. 10. From this pattern, the authors can note that the NW-SE line system composed of KOZU-MATSUDA-KAWAHARABATA LINE, TSURUKAWA-ISEHARA LINE, TACHIKAWA AND ITS EXTENDED LINE, FUJIOKA-ARAKAWA LINE and KIRIU-AGATSUMA LINE is remarkable in their continuity and parallel. On the other hand, other? line systems do not show so regularlly as NW-SE line system. However, SHIBUSAWA-SURUGAOYAMA LINE, TOMIOKA SOUTH LINE and ASHIO FAULT LINE of E-W or NE-SW line system is remarkable in length and continuity.
    The authors have plan to survey the tectonical lineaments in detail which have not yet recongnized as active fault, and to study various characters of active fault such as the total length, the active cycle, the average displacement and the stress system in Kanto District.
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  • Takeei KOIZUMI
    1977 Volume 86 Issue 2 Pages 110-120
    Published: April 25, 1977
    Released: November 12, 2009
    JOURNALS FREE ACCESS
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  • Teiichi KOBAYASHI
    1977 Volume 86 Issue 2 Pages 121-134
    Published: April 25, 1977
    Released: November 12, 2009
    JOURNALS FREE ACCESS
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  • [in Japanese]
    1977 Volume 86 Issue 2 Pages 135
    Published: April 25, 1977
    Released: November 12, 2009
    JOURNALS FREE ACCESS
    Download PDF (159K)
  • [in Japanese]
    1977 Volume 86 Issue 2 Pages 136-137
    Published: April 25, 1977
    Released: November 12, 2009
    JOURNALS FREE ACCESS
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  • [in Japanese]
    1977 Volume 86 Issue 2 Pages Plate1-Plate2
    Published: April 25, 1977
    Released: November 12, 2009
    JOURNALS FREE ACCESS
    Download PDF (2494K)
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