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Book Chapter

The Palaeo-Tokyo Bay concept

By
Michiko Yajima
Michiko Yajima
College of Liberal Arts and Sciences, Tokyo Medical and Dental University, 2-8-30 Kohnodai, Ichikawa-shi, Chiba 272-0827, Japan (e-mail: yajima.michiko@gupi.jp or pxi02070@nifty.com)
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Published:
January 01, 2008

Abstract

Tokyo is situated in the southern part of the Kanto Plain, the largest plain in Japan. It is filled with thick marine Quaternary sediments deposited in the Palaeo-Tokyo Bay. The concept of a Palaeo-Tokyo Bay was proposed by Hisakatsu Yabe in 1913 and 1914, based on molluscan fossils, geography and tectonics. Palaeo-Tokyo Bay used to open to the east and, at the time of the high sea-level phase, perhaps also to the south, whereas the modern Tokyo Bay opens to the south. The Paleao-Tokyo Bay concept is supported by recent sedimentological evidence, sequence stratigraphy and tectonic studies, and is considered to have formed in a forearc basin near the triple junction of plates (the Pacific, Asian and Philippine plates) and trenches (Japan Trench, Sagami Trough and Izu-Ogasawara Trench) in the Quaternary. The bay is unique and shows evidence of repeated differential vertical movements during its formation.

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Contents

Geological Society, London, Special Publications

History of Geomorphology and Quaternary Geology

R. H. Grapes
R. H. Grapes
Korea University, South Korea
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D. Oldroyd
D. Oldroyd
The University of New South Wales, Australia
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A. Grigelis
A. Grigelis
Lithuanian Academy of Sciences, Lithuania
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Geological Society of London
Volume
301
ISBN electronic:
9781862395497
Publication date:
January 01, 2008

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