Australia's Four Billion Year Diary
Australia
is the time capsule of the planet. No other continent has so faithfully
preserved the early milestones in Earth's geological and biological
evolution. The story embedded in its rocks and in the genes of its modern
plants and animals recounts most of the seminal events that shaped the
Earth's present biosphere and its opulent biota.
To bring the four-billion-year time scale of
this story within easy grasp it has been set against a one-year calendar
and presented in 12 ‘'monthly' instalments. Technically edited
by professors Malcolm Walter and John Veevers of Macquarie University,
each instalment outlines both the tectonic development of the continent
at that time and the coincidental evolution of metabolic or structural
features that are now enshrined in the cells of our bodies. In this
sense then, Australia's Four-Billion-Year Diary also presents us with a diary of our own early evolution.
Maps at the back of the book show Australia's underlying tectonic structure
and its early linkage to the supercontinents Pangaea and Gondwana (see
Study Aids). Many Australian plants and animals confirm these linkages
by the curious distribution pattern of their relatives (see Study Aids).
Finally, the underlying nature of biological evolution is explained
with the aid of a Tree-of-Life diagram, and it is set alongside a geological
time scale that logs most of the major evolutionary milestones recorded
in Australia's geological strata.
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