καβάλα η μια στην άλλη

[altan]

Hi,
What does "καβάλα" mean at here, please? Something like burden (v), back (v) or "one thing on top of another".

 

[Themis†]

One on top the other; intermingled; following one another in an uninterrupted succession.

 

[altan]

Thanks Themis.