The milky color of most glacial rivers is caused by silt, a fine powder created when glaciers pulverize rock as they move slowly down valleys.
(The milky color of most glacial rivers; is caused; by silt) (a fine powder; created; T:when glaciers pulverize rock as they move slowly down valleys) (glaciers; pulverize; rock; T:as they move slowly down valleys) (they; move slowly; down; valleys)
The milky color of most glacial rivers a fine powder glaciers they
is caused created pulverize move slowly
by silt
T:when glaciers pulverize rock as they move slowly down valleys
rock T:as they move slowly down valleys
down valleys