Friday essay: Trace fossils – the silence of Ediacara, the shadow of uranium

As an archaeologist working in the remote areas around Woomera and the Nullarbor Plain, my understanding of South Australia was first informed by rocks and soil. This was a landscape of fossils and trace fossils – the preserved impressions left by the passage of a living body through sediment – jostling for attention. On this land surface, SA presents an arc extending from the “death mask” fossils of early multicellular life to the human leap into the solar system. Sure, you might say, this could be said of other locations on Earth. But here it seems laid bare for any who can read the distinctive pattern of signs.