The South Australian  modernist painter thst I have the greatest affinity to is Dorrit Black. She used the unique forms of the  Fleurieu Peninsula landscape  as the basis for  her modernist works, such as Coast Road (1942) and Cliffs at Second Valley (1949). The latter is not online.

The pallette in Black's   work of the 1940s is sombre, the approach is cubist, the forms sculptural, and there is a gesture towards the sublime.