During Pliocene time, large quantities of eroded material from the Rocky Mountain region were transported by wind and water southeastward and deposited on the then existing surface of primarily Triassic and Permian age rocks.
(large quantities of eroded material from the Rocky Mountain region; were transported; by wind and water southeastward; T:During Pliocene time) (large quantities of eroded material from the Rocky Mountain region; deposited; T:During Pliocene time)
large quantities of eroded material from the Rocky Mountain region large quantities of eroded material from the Rocky Mountain region
were transported deposited
by wind and water southeastward T:During Pliocene time
T:During Pliocene time