| U-Series & U-Pb variants | URN |
| Argon-Argon | ARG |
| Paleomag | PMG |
| Chemical stratigraphic correlation | CHM |
| Oxegen Isotope Stage Correlation | OIS |
| Biostratigraphy | BIO |
| Physical stratigraphic correlation/inference | STR |
| Electron spin resonance | ESR |
| Optically Stimulate Luminescence | OSL |
| Estimate | EST |
| Radiocarbon | C14 |
| Thermoluminesence | TLM |
| Archaeology correlation | ARC |
| Aluminum Beryllium | ALM |
| Gamma ray spectrometry | GAM |
| cosmogenic nuclides | COS |
| infrared stimulated luminescence | IRL |
| Obsidian hydration dating | OHD |
| Other | OTR |