Name of the Relative-age
dating principle:
Superpos
Inclusions
Original horizontality
Lateral continuity
Cross-cutting relationships
What it is about:
The layer of rock on the
bottom is the oldest.
Older pieces of rock that
become part of newer rock.
All rock layers were laid
horizontally originally.
Sediment will spread
laterally in all directions.
A fault or magma that cuts
through rock layers is
newer than the layers.