exceed ten feet. This band has been styled by Professor A. H. Green the basement conglomerate of the Kimberley shales,1
and it is assumed by Mr. E. J. Dunn to be of the same origin as the
Dwyka conglomerate belt on the northern base of the Zwarte Berg and
Witte Berg mountains, forming the southern boundary of the old lake
basin.2 He holds that this conglomerate is a glacial deposit marking the shore line of the ancient lake.
1
"A Contribution to the Geology and Physical Geography of the Cape
Colony." Quar. Jour. Geol. Soc, Vol. 44 (1888), p. 245.
2 " On the Mode of Occurrence of Diamonds in South Africa." Quar. Jour. Geol. Soc, Vol. 30 (1874), pp. 54-59.
