2. If you use large dots to show cities of 600,000 or more people in 1900 and small dots for the other cities, what impression would the
map give readers about the relative size of cities?

the precambrian aged rocks could be found in australia. australia is a region that has a lot of ancient civilization history from million years ago. in this region, there are a lot of recognizable fossils buried in its land which is considered a precambrian-aged rocks