This folder describes the contents of the carbon data spreadsheet from the AFL Radiocarbon Dataset.
| Column name | corresponding entity | SEAD column | Description |
|---|---|---|---|
| A. Group | Entity sample_groups | sample_group_name | A categorical label used to organise individual bones and all associated analyses (isotopes, radiocarbon dating, and aDNA) into meaningful sets. |
| B. Isotope lab number | Entity physical_samples | A unique identifier assigned by the isotope laboratory. | |
| C. Radiocarbon Lab nr | Entity sample_alt_refs | where alt_ref_type = Radiocarbon Lab Number | The laboratory identifier for radiocarbon dating samples, assigned by the lab where the analysis was performed. The corresponding radiocarbon results are provided in a separate spreadsheet. |
| D. DNA lab nr | Entity sample_alt_refs | where alt_ref_type = DNA Lab Number | A unique identifier assigned by the respective ancient DNA (aDNA) lab. The actual aDNA data are on a separate spreadsheet. |
| E. GenBank accession nr | Entity sample_alt_refs | where alt_ref_type = GenBank Lab Number | An identifier for sequences stored in GenBank. |
| F. Site | Entity site | site_name | The archaeological site name where the individual/sample was found. |
| G. Long/lat | Entity site | latitude_dd longitude_dd | Geographic coordinates. It came as a single column, and I broke it into one for latitude, and one for longitude. |
| H. Parish | Entity location | location_name (and location_type = Parish) | A historical/administrative unit |
| I. Country | Entity location | location_name (and location_type = Country) | Modern country where the site is located. |
| J. Relative Chronology | Entity relative_ages | relative_age_name (see table) | The archaeological time period assignment, based on typology or context rather than absolute dating. LM/EN: Late Mesolithic/Early Neolithic MN: Middle Neolithic BA: Bronze Age IA: Iron Age |
| K. Bone | Entity abundance_element | element_name | Specifies which skeletal element was sampled. |
| L. Biological Age | Entity abundance_modifications | modification_type_name = biological age and modification_type_description = | Estimated age at death of the individual. Categories (neonat, juvenile, yealing 0-3 months, yearling 3-10 months, adult, subadult) |
| M. δ¹³C (d13C) | email sent to Phil and Aikaterini 2026-04-09 asking about these from here down | The stable carbon isotope ratio, expressed in per mil (‰), measured in collagen extracted from bone or tooth. | |
| N. δ¹⁵N (d15N) | The stable nitrogen isotope ratio, expressed in per mil (‰), measured in collagen extracted from bone or tooth. | ||
| O. C/N ratio | The atomic carbon-to-nitrogen ratio of extracted collagen. | ||
| P. %C | The percentage of carbon present in the collagen sample. | ||
| Q. %N | The percentage of nitrogen present in the collagen sample. |