carbon isotope excursion
C27484
concept
A carbon isotope excursion is a geologically rapid, significant shift in the ratio of stable carbon isotopes (typically δ13C) recorded in sediments or fossils, reflecting major changes in the global carbon cycle and often associated with climatic or biotic events.
All labels observed (3)
| Label | Occurrences |
|---|---|
| carbon isotope excursion canonical | 3 |
| Permian extinction event | 1 |
| carbon isotope anomaly | 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: carbon isotope excursion
Generated description
A carbon isotope excursion is a geologically rapid, significant shift in the ratio of stable carbon isotopes (typically δ13C) recorded in sediments or fossils, reflecting major changes in the global carbon cycle and often associated with climatic or biotic events.
Instances (4)
| Instance | Via concept surface |
|---|---|
| Lomagundi–Jatuli carbon isotope excursion | — |
| Capitanian (Guadalupian) mass extinction | Permian extinction event |
| Lomagundi event | — |
| Lomagundi excursion | — |