This work investigates the geological evolution and prehistoric biological development of the Australian continent across deep time. Charles Francis Laseron, a respected naturalist and curator, synthesizes geological data and fossil records to reconstruct the shifting landscapes and ancient ecosystems that preceded modern Australia. The text provides a chronological framework for understanding how tectonic movements and environmental changes shaped the continent's unique natural history.

The text is regarded as a foundational, accessible survey of Australian natural history, valued for its ability to synthesize complex geological concepts for a general audience. Its enduring presence in multiple editions reflects its status as a reliable reference for those interested in the deep-time development of the Australian landmass.