Interest in the rock art of the original inhabitants of Australia has grown over the last two centuries. A. Late nineteenth century studies of Aboriginal rock art failed to recognize that a variety of styles existed. B. The extreme age of the earliest Aboriginal rock art has been established but the interpretation of rock art images is still debated. C. A sequence from geometric to more representative art fits many sites but does not necessarily indicate a progression from simple to complex meaning. D. In determining the way in which Australian rock art was organized, archaeologists have made little distinction between geometric and figurative elements. E. Older examples of rock art consist of simple, repeated geometric patterns while later rock art includes figures and animals. F. Aboriginal informants were able to explain the meanings of ancient rock art symbols.