scholarly journals Reply to the Comments by H. Takemoto on “Mud Flow Deposits Derived from the Activity of Asama Volcano and Their Impacts on the Geomorphic Development of the Northwestern Part of the Kanto Plain, Central Japan” in Terms of the Significance in Historical Geomorphology

2008 ◽  
Vol 81 (6) ◽  
pp. 516-529 ◽  
Author(s):  
H. YOSHIDA
Keyword(s):  
Northwestern Part ◽  
Central Japan ◽  
Asama Volcano ◽  
Mud Flow

The Precambrian problem in younger orogenic zones: An example from Japan

1968 ◽  
Vol 5 (3) ◽  
pp. 643-648 ◽  
Author(s):  
Tatsuro Matsumoto ◽  
Masaru Yamaguchi ◽  
Takeru Yanagi ◽  
Susumu Matsushita ◽  
Ichikazu Hayase ◽  
...  
Keyword(s):  
Radiometric Dating ◽  
Granitic Rocks ◽  
Northwestern Part ◽  
Precambrian Basement ◽  
Early Paleozoic ◽  
Central Japan ◽  
Field Evidence ◽  
Orogenic Zone

We have examined some of the presumed Precambrian basement metamorphic and granitic rocks in Japan, through radiometric dating as well as on field evidence, and have found that mineral ages of about 175 to 250 m.y. are abundant in the Hida area, northwestern part of central Japan, that a number of thrust rocks in southwestern Japan show ages of 400 to 450 m.y., and that the oldest of the measured samples is about or somewhat over 500 m.y. Little evidence is available to support a view that the Pre-Sinian rocks, if ever existent, have remained unaltered under such a polycyclic orogenic zone as that represented by Japan, although remnants of the youngest Precambrian to Early Paleozoic cycle can be detected.

scholarly journals The preservation of proto-Japanese tone class 2.5 in the Izumo region explained

2020 ◽  
Vol 49 (2) ◽  
pp. 107-135
Author(s):  
Elisabeth M. DE BOER ◽  
Petros LOUKAREAS
Keyword(s):  
Northwestern Part ◽  
Central Japan ◽  
Western Japan ◽  
Formed Part ◽  
Phonetic Realization

Abstract In 1981, Okumura Mitsuo reported that the dialect of Izumo Taisha in western Japan had preserved remnants of the separate tone class 2.5, which until then had only been found in dialects in central Japan. His discovery proved that this tone class had formed part of proto-Japanese, but the phonetic realization in Izumo and in central Japan was totally different. The article offers a reconstruction of the proto-system of the Izumo region, as well as an explanation of how class 2.5 came to be (partly) preserved in Izumo. It is argued that this was through a series of rightward shifts of the /H/ tone. These shifts radiated out from the northwestern part of the region. In the period, when the shifts were active, a contour tone on the second syllable of class 2.5 blocked rightward /H/ tone shift in this class. In this way, the contour tone, although later lost, left a trace in the modern dialects.

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