Simplify the following text for a Grade 6 native English-speaking person.
Original: The antiquity of the Finke River is not unique , but applies equally to other large mountain-sourced river systems in central Australia , e.g. the Todd and Hale Rivers and many others , because most of the central Australian mountain belts formed at around the same time .
Simplified: The age of the Finke River is not unique . There are other large mountain-sourced river systems in central Australia including the Todd and Hale Rivers where the mountains were formed at the same time . .