Harada N.; Uchida M.; Shin K.H.; Murata A.; Nakatani T.(2003)
We investigated the characteristics of the alkenones produced by a bloom of Emiliania huxleyi in the eastern Bering Sea in 2000. Alkenones were detected in surface waters between 57°N and 63°N, where phosphate concentrations ...
Harada N.; Kondo T.; Fukuma K.; Uchida M.; Nakamura T.; Iwai M.; Murayama M.; Sugawara T.; Kusakabe M.(2002)
There are few conventional dating methods that can be used to estimate the geological age of siliceous sediments on the order of 104-105 yr. In contrast, methods such as δ18O are available for dating carbonate-containing ...