Upper Cretaceous stage
C12877
concept
The Upper Cretaceous stage is a late subdivision of the Cretaceous Period characterized by widespread marine transgressions, diverse dinosaur and marine reptile faunas, and the lead-up to the mass extinction at the Cretaceous–Paleogene boundary.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Upper Cretaceous stage canonical | 1 |
| subdivision of the Cretaceous Period | 1 |
Description generation (CDg)
The one-sentence description above was generated by prompting gpt-5.1 with the class name and this instruction.
Instruction
generate a one-sentence description for a given conceptual class. # Response Format Return only the sentence: "Description: [one-sentence description of the conceptional class]"
Input
Class: Upper Cretaceous stage
Generated description
The Upper Cretaceous stage is a late subdivision of the Cretaceous Period characterized by widespread marine transgressions, diverse dinosaur and marine reptile faunas, and the lead-up to the mass extinction at the Cretaceous–Paleogene boundary.
Instances (2)
| Instance | Via concept surface |
|---|---|
| Late Cretaceous | subdivision of the Cretaceous Period |
| Maastrichtian | — |