geological era
C2276
concept
A geological era is a major division of Earth's history, spanning tens to hundreds of millions of years, characterized by significant and distinguishable changes in the planet's climate, life forms, and geology.
All labels observed (8)
| Label | Occurrences |
|---|---|
| geologic era | 6 |
| geological era canonical | 4 |
| subdivision of the Proterozoic Eon | 3 |
| Archean era | 1 |
| Archean subdivision | 1 |
| eonothem/era in the geologic time scale | 1 |
| geologic time unit | 1 |
| hypothetical geological era | 1 |
Instances (12)
| Instance | Via concept surface |
|---|---|
| Paleozoic Era | geologic era |
| Cenozoic | — |
| Paleoarchean Era | geologic era |
| Eoarchean Era | — |
| Erathem | geologic time unit |
| Mesoarchean Era | geologic era |
| Neoarchean Era | — |
| Novacene epoch | hypothetical geological era |
| Paleoproterozoic Era | geologic era |
| Mesoproterozoic Era | geologic era |
| Neoproterozoic Era | geologic era |
| Mesozoic Era | — |