Paleoenvironmental changes of
the Japan Sea
during the last 2 million years
Michio
Kato, Ph. D., Professor |
 |
The Japan Sea was formed about 20 million years ago, and it became the present environment after the various changes of the marine environment were experienced. The Japan Sea has become the tropical ? subtropical seas, and or has become “the Sea of the death” where the benthic organisms die out during the long history. These marine environmental changes are recorded in the facial changes of the bottom sediments and the faunal changes of the fossils.
We have been continuing the researches to clarify the history of the marine environmental changes of the Japan Sea during the last 2million years based on microfossils such as foraminifers and ostracodes. Furthermore, to appreciate the environment of the past Japan Sea, we are continuing the research which explains the characteristics of the depth and geographical distributions of the microorganisms in the present Japan Sea.
In the reason of the foraminifers living in the shallower than the 200m depth of the present Japan Sea which are affected by the Tsushima Warm Current, we are started the researches about the depth distributions of the microorganisms in the East China Sea located in the south of the Japan Sea.
