Simplify the following text for a Grade 8 native English-speaking person.
Original: Its source is in the Northern Territory 's MacDonnell Ranges , and the name Finke River is first applied at the confluence of the Davenport and Ormiston Creeks , just north of Glen Helen .
Simplified: It starts in the MacDonnell Ranges in the Northern Territory . it is formed where Davenport and Ormiston Creeks join together , just north of Glen Helen .