Valley glaciers join progressively larger and larger valley glaciers, forming a network similar to a stream tributary system (tree).
(Valley glaciers; join; progressively larger and larger valley glaciers) Context(Valley glaciers join,List([0, 20))):(Valley glaciers; join progressively larger and larger valley glaciers forming; a network similar to a stream tributary system)
Valley glaciers join,List([0, 20))
Valley glaciers Valley glaciers
join join progressively larger and larger valley glaciers forming
progressively larger and larger valley glaciers
a network similar to a stream tributary system