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Paleomagnetism of Tertiary rocks from the OGA Peninsula and the rotation of northeast Japan
Author(s) -
Tosha Toshiyuki,
Hamano Yozo
Publication year - 1988
Publication title -
tectonics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.465
H-Index - 134
eISSN - 1944-9194
pISSN - 0278-7407
DOI - 10.1029/tc007i003p00653
Subject(s) - paleomagnetism , geology , peninsula , clockwise , volcanic rock , sedimentary rock , volcano , seismology , paleontology , rotation (mathematics) , geomorphology , archaeology , geography , geometry , mathematics
We have made a paleomagnetic study of Tertiary rocks from the Oga Peninsula, northern Honshu Island. Volcanic and sedimentary rocks were sampled from 26 sites in the peninsula. The ages of the rocks range from 62 Ma to the present. The results indicate a counterclockwise rotation of Northeast Japan with respect to eastern Asia around a pole at 58°N, 149°E, between about 22 Ma and 15 Ma. The amount of the rotation is about 20°. Before the rotation, Northeast Japan was situated along the east coast of the Asian continent.