What could a geologist say about that section of rock?
Following the Principle of Original Horizontality, he could say that whatever forces caused the deformation, like an earthquake, must have occurred after the formation of all the rock strata.
Geologists use this type of method all the time to establish relative ages of rocks.
The highest layers tell them what happened more recently, and the lowest layers tell them what happened longer ago.
Relative dating cannot establish absolute age, but it can establish whether one rock is older or younger than another.