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一、鄂霍茨克文化时期日本的古环境与古气候 大约在2～1.8万年前的最后冰期,为日本海水位的最大低落期,直到约5500年前绳文海进最盛期(最大海进期),海水位呈现迅速上升,此后,直到现在其变化速度趋于平缓,这就是全新世日本海水水位的变化曲线(太田等,1982年)。因而,受波浪影响较少的海底及其周围地形(包括堆积物)和含化石的地层适合于研究绳文海进最盛期以后的海水水位低落期或停滞期(太田等,1982年)。另一方面,残留在陆地
First, the Okhotsk culture period Japan’s ancient environment and paleoclimate in about 2 to 18 million years ago, the last glacial period, the maximum sea level of the Japanese low until about 5,500 years ago, the peak of the sea into the rope (maximum sea ), The seawater level showed a rapid rise. Since then, the rate of change has been gentle until now. This is the change curve of the seawater level in the Holocene Japan (Ota et al., 1982). Therefore, the seabed and its surrounding terrain (including sediments) and fossil-bearing formations less affected by the waves are suitable for studying the sea level drop or stagnant period after the peak of the Jomon Sea (Ota et al., 1982). On the other hand, it remains on land