Random triples
| Subject | Object |
|---|---|
| gptkb:North_Sea_basin | limestone |
| gptkb:Koobi_Fora_Formation | mudstone |
| gptkb:North_Sea_basin | gptkb:stone |
| gptkb:Koobi_Fora_Formation | gptkb:stone |
| gptkb:Koobi_Fora_Formation | volcanic ash layers |
| gptkb:Koobi_Fora_Formation | siltstone |