Keywords
Received 17 December 1992; published 13 April 1993
New Zealand Journal of Geology & Geophysics, 1991, Vol. 36: 137—138
0028Ð8306/06/3601—0137 ©The Royal Society of New Zealand 1991
PDF file of entire paper: medium quality (263K); (scanned from paper original: notes about this process). Digitisation of this article from the printed journal was kindly facilitated by the Geological Society of New Zealand