What is under bedrock in real life?

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Tags

1. #solid
2. #which
3. #hundreds
4. #overlying
5. #meters
6. #material
7. #loose
8. #toward
9. #materials
10. #surface
11. #beneath
12. #below
13. #particles
14. #bedrock
15. #extend
16. #gravel
17. #unconsolidated
18. #crust
19. #earth
20. #often