Circular holes in the kame terraces form when ice blocks left in the sediment melt.
(Circular holes in the kame terraces; form; T:when ice blocks left in the sediment melt) (ice blocks; left; L:in the sediment melt)
Circular holes in the kame terraces ice blocks
form left
T:when ice blocks left in the sediment melt
L:in the sediment melt