What causes an oasis?

Related questions

1. What was the last gig Oasis played?
2. Why does desert oasis exist?
3. What is Oasis What is its significance?
4. Why did Oasis break up?
5. What happened Oasis?
6. Is Liam Gallagher still married?
7. What is desert oasis?
8. What animals live in an oasis?
9. What is an example of an oasis?
10. How does an oasis work?

Tags

1. #source
2. #water
3. #naturally
4. #rocks
5. #beneath
6. #plants
7. #river
8. #fertile
9. #becomes
10. #surface
11. #because
12. #which
13. #accumulated
14. #below
15. #percolate
16. #there
17. #desert
18. #oasis
19. #underground