Abstract
K and Rb have been determined for a series of lavas from a continental alkaline suite in the Nandewar Mountains, N.S.W., Australia. The K Rb (wt.) ratios of the basic rocks are high (426, range ± 48) and similar to those of the basic rocks in the Hawaiian alkali-olivine basalt trachyte sequence (505, range ± 81), but differ from those reported from the continental alkaline lavas in Antarctica and Otago, N.Z. (347, range ± 54).
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