1. Boström, K., and Peterson, M. N. A., Mar. Geol., 7, 472 (1969).
2. Boström, K., Peterson, M. N. A., Joensuu, O., and Fisher, D., J. Geophys. Res., 74, 3261 (1969).
3. Maxwell, A. E., et al., Initial Reports of the Deep Sea Drilling Project, 3, chaps 3–13, 15 and 17 (US Govt Printing Office, Washington, 1970).
4. Bender, M., Broecker, W., Gornitz, V., and Middel, U., EOS, 51, 327 (1970) (abstract).
5. Boström, K., EOS, 51, 327 (1970) (abstract), Earth Planet. Sci. (in the press).