- Kettles are areas where ice chunks broke off the retreating glacier and subsequently melted to form a depression.
(- Kettles; are; areas where ice chunks broke off the retreating glacier and subsequently melted to form a depression) (ice chunks; broke off; the retreating glacier; L:areas)
- Kettles ice chunks
are broke off
areas where ice chunks broke off the retreating glacier and subsequently melted to form a depression
the retreating glacier L:areas