The youngest rocks in the Grand Canyon are recognized by all to be volcanic rocks in western Grand Canyon that flowed from the top of and into the canyon.
(The youngest rocks in the Grand Canyon; are recognized; by all) (The youngest rocks in the Grand Canyon; to be; volcanic rocks in western Grand Canyon) (volcanic rocks in western Grand Canyon; flowed; from the top of and into the canyon)
The youngest rocks in the Grand Canyon The youngest rocks in the Grand Canyon volcanic rocks in western Grand Canyon
are recognized to be flowed
by all
volcanic rocks in western Grand Canyon
from the top of and into the canyon