Subcommission on Carboniferous Stratigraphy
GSSPs
Nevertheless, it is the aim of SCCS to make significant progress over the next years to achieve the definition of the missing GSSPs! It must be highlighted that also candidates for boundary criteria or sections have been used and discussed by working groups, those remain only working hypotheses and cannot be used before official ratification by SCCS and ICS.
| Stage | GSSP Location | Correlation Events | Status |
|---|---|---|---|
| Gzhelian Stage | FAD conodont Idiognathodus simulator (s.str.). Close to FAD of ammonoid Shumardites. | GSSP proposal anticpated for early 2026 | |
| Kasimovian Stage | several organisms under consideration | ||
| Moscovian Stage | 2 conodont species under consideration | ||
| Bashkirian Stage | Arrow canyon section, Nevada, USA | FAD conodont Declinognathodus noduliferus | Ratified 1996 |
| Serpukhovian Stage | FAD of conodont Lochriea ziegleri under consideration | ||
| Visean Stage | Pengchong section, Guangxi, China. | Benthic foraminifera FAD of Eoparastaffella simplex | Ratified 2007 |
| Tournaisian Stage | La Serre section, Montagne Noire, France | Conodont FAD of Siphonodella sulcata | Ratified 1989; redefinition anticipated for 2027 |
See an online map of all GSSP locations at the ICS’ main GSSP page.