Random triples
| Subject | Object |
|---|---|
| gptkb:Hettangian_stage | Hettangian layers |
| gptkb:Portland_Stone_Formation | Sedimentary rock |
| gptkb:Hettangian_stage | Hettangian sequences |
| gptkb:Hettangian_stage | Hettangian formations |
| gptkb:Hettangian_stage | Hettangian deposits |