Global Boundary Stratotype Section and Point
E364216
UNEXPLORED
The Global Boundary Stratotype Section and Point (GSSP) is an internationally agreed reference point in a specific rock sequence that precisely defines the lower boundary of a stage or age in the geologic time scale.
Referenced by (1)
| Subject (surface form when different) | Predicate |
|---|---|
|
Maastrichtian
→
|
definedBy |