In the paper, " Tertiary-Age Diamondiferous Fluvial Deposits of the
Lower Orange River Valley, Southwestern Africa," by R.J. Jacob, B.J. Bluck,
and J.D. Ward (Vol. 94, issue 4, 1999, p. 749), errors with reference to age
were made in the Abstract. Corrected sentences are below; line numbers indicate
where each of the two sentences begins.
Paragraph 1, line 9: The earliest (proto-) Orange River terraces, richer in
diamonds than the younger, intermediate (meso-) Orange River deposits, form
low-grade but large-average, diamond- size, gem quality placers which are mainly
Paragraph 4, line 1: Although the vertical decline in diamond...