Shown below is a real transect across the entire Grand Canyon (in two parts).This profile is composed of both the surface topography and the inferred geology underfoot.
We have seen that a cliff or a road cut is a local "geologic cross-section" -- a side view of the geology at one location.
As geologists piece together the information at various outcrops, they can begin to assemble a "geologic map" (like a road map) of an entire region (consisting of many square miles).
When did all this faulting take place (that is, between the times of which two sedimentary layers did the faulting occur)? Notice the "Great Angular Unconformity" shown on the North Half of the profile.
This is not labeled as such -- but see how the rocks at the bottom of the profile have been tilted while the younger rocks on top are horizontal.
This map displays the large-scale (also called "regional") geologic features they have inferred are present beneath the landscape.