But it appears Hood Canal is the work of rivers and a series of glaciers that exploited a weakness along the edge of the Olympic Mountains, a weakness probably created by a geologic fault line.
(glaciers; exploited; a weakness along the edge of the Olympic Mountains) (a weakness; probably created; by a geologic fault line)
glaciers a weakness
exploited probably created
a weakness along the edge of the Olympic Mountains
by a geologic fault line