A geologists day job is going into the field and learning about rocks and nature. For most people, it’s a weekend activity or holiday. Most of these localities are a day or weekend trip from major cities, though some of them would be more like stop-overs in much larger trips.
A Geological time scale divides time into Eons, Eras, Periods, Epochs and Ages. It is based on the geological rock record and relies on the ages of particular fossils, in particular layers of rock which sit on top of each other in a sequence. What this means is, rocks in Australia can be matched with rocks in England or China or Africa – all by fossils.
The map above is overlain by shapes which correlate to the actual geology below the ground. If you select them it will tell you which era the rocks belong in.
The locations in the map above are divided into different Eras: Cenozoic, Mesozoic, Paleozoic and – beyond that – Pre-Cambrian. The colours match this chart.