Figure 7.5: Geologic column of the Grand Canyon. The sedimentary rocks of groups 3
through 6 were deposited horizontally and remain horizontal. Group 2 rocks were deposited
horizontally but have been tilted. Group 1 rocks are not sedimentary. The rock layers at
the bottom of the stack are the oldest while the ones at the top are the youngest. ( 32 )
marvins-underground-k-12
(Marvins-Underground-K-12)
#1