Thesaurus Term/Concept: TRIAL LEVEL
| Identifier | 152319 |
|---|---|
| Class | MONUMENT TYPE |
| Status | Preferred |
| Index? | Yes |
| Scope Note | Vertical or horizontal levels driven into a hill slope to assess the viability of mineral resources but never fully exploited. |
| Identifier | 152319 |
|---|---|
| Class | MONUMENT TYPE |
| Status | Preferred |
| Index? | Yes |
| Scope Note | Vertical or horizontal levels driven into a hill slope to assess the viability of mineral resources but never fully exploited. |