Kettle Ponds As the glacier thawed, iceberg-sized chunks of ice broke off and were buried beneath accumulating sand and gravel washed from the ice.
(the glacier; thawed; ) (iceberg-sized chunks of ice; broke off; T:As the glacier thawed) (iceberg-sized chunks of ice; were buried; ) (gravel; washed; from the ice)
the glacier iceberg-sized chunks of ice iceberg-sized chunks of ice gravel
thawed broke off were buried washed
T:As the glacier thawed
from the ice