https://cdn.earthdata.nasa.gov/conduit/upload/5182/KeywordsCommunityGuide_Baseline_v1_SIGNED_FINAL.pdf 23.7 2026-04-15T10:53:30.610Z https://gcmd.earthdata.nasa.gov/KeywordViewer/scheme/sciencekeywords/bf0db125-0182-42e7-81c9-6ed55a05ddd0 RADIOCARBON Date=2024-10-24 User Id=tstevens Entity=WeightedRelation Operation=INSERT System Note=insert WeightedRelation New Value=id: null related concept uuid: 6641ff15-36c8-4dbc-bf9c-176a08688173 relationship type: null relationship value: null generated by: null Date=2024-10-24 User Id=tstevens Entity=WeightedRelation Operation=INSERT System Note=insert WeightedRelation New Value=id: null related concept uuid: 23822618-39a2-4b2b-9162-37bb0651c118 relationship type: null relationship value: null generated by: null Date=2024-10-24 User Id=tstevens Entity=WeightedRelation Operation=INSERT System Note=insert WeightedRelation New Value=id: null related concept uuid: bf0db125-0182-42e7-81c9-6ed55a05ddd0 relationship type: null relationship value: null generated by: null Date=2024-10-24 User Id=tstevens Entity=WeightedRelation Operation=INSERT System Note=insert WeightedRelation New Value=id: null related concept uuid: a389bcd6-929d-43ac-9af1-5a20a4ddcbe2 relationship type: null relationship value: null generated by: null Radiocarbon refers to radioactive carbon especially carbon-14, but alsocarbon-10 and carbon-12. Carbon-14 is a heavy radioactive isotope of Carbonhaving a mass of 14 and a half-life of 5730 +/-40 years. Carbon-14 is useful indating organic materials during the last 50,000 years. 2024-10-24 12:35:51.0