Many of the CPB wetlands are found in kettle holes, which were formed by the melting of detached, buried blocks of glacial ice.
(Many of the CPB wetlands; are found; L:in kettle holes) (kettle holes; were formed; by the melting of detached)
Many of the CPB wetlands kettle holes
are found were formed
L:in kettle holes
by the melting of detached