Random triples
| Subject | Object |
|---|---|
| gptkb:potassium–argon_dating | rocks older than 100,000 years |
| gptkb:Dendrochronology | charcoal |
| gptkb:Dendrochronology | gptkb:artifacts |
| gptkb:Dendrochronology | wood |
| gptkb:Dendrochronology | historical buildings |
| gptkb:argon–argon_dating | samples as old as billions of years |
| gptkb:argon–argon_dating | samples as young as a few thousand years |