scholarly journals Fission track ages of eight tuffs in the upper part of the Awa Group, Boso Peninsula, central Japan.

2000 ◽  
Vol 106 (8) ◽  
pp. 560-573 ◽  
Author(s):  
Shuichi Tokuhashi ◽  
Tohru Danhara ◽  
Hideki Iwano
Keyword(s):  
Fission Track ◽  
Central Japan ◽  
Boso Peninsula ◽  
Fission Track Ages

Fission-Track Ages of Tuff Layers Related to the Pliocene-Pleistocene Boundary on the Boso Peninsula, Japan

1990 ◽  
Vol 33 (1) ◽  
pp. 86-93 ◽  
Author(s):  
Masao Kasuya
Keyword(s):  
Fission Track ◽  
Middle Part ◽  
Late Cenozoic ◽  
Boso Peninsula ◽  
Normal Polarity ◽  
Fission Track Ages ◽  
Age Constraints

AbstractFission-track ages of zircon crystals from four tuff layers in the late Cenozoic sediment sequence of the Boso Peninsula,.Japan, are 1.6 ± 0.2 myr (the Kurotaki Formation), 5.5 ± 0.6 and 5.2 ± 0.5 myr (the uppermost part of the Amatsu Formation), and 11.5 ± 0.8 myr (the middle part of the Amatsu Formation). These ages provide numerical age constraints on magneto-biostratigraphy. The normal polarity interval in the lower part of the Kiwada Formation corresponds to the Olduvai polarity subzone. The boundary between the Pliocene and Pleistocene lies slightly above the Olduvai polarity subzone.

scholarly journals Fission Track Ages of Several Quaternary Tephras in Kanto and Chubu Regions, Central Japan.

1998 ◽  
Vol 107 (3) ◽  
pp. 348-367 ◽  
Author(s):  
Takehiko SUZUKI ◽  
Osamu FUJIWARA ◽  
Tohru DANHARA
Keyword(s):  
Fission Track ◽  
Central Japan ◽  
Fission Track Ages

scholarly journals Fission-track Ages of the Early Pleistocene Tephras in the Kazusa Group in Tama Hills, Central Japan.

2002 ◽  
Vol 41 (5) ◽  
pp. 421-426 ◽  
Author(s):  
Hisatoshi Ito ◽  
Tomonori Taniguchi ◽  
Kentaro Shinohara ◽  
Tetsuto Eto
Keyword(s):  
Fission Track ◽  
Early Pleistocene ◽  
Central Japan ◽  
Fission Track Ages
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