| skos:altLabel | - shale rock
- shale
- argillaceous
- mudstones
- shales
- Black shale
- Grindslow shale
- Shale partings
- Shale#Black shale
- Shaly intervals
- \"black\" or carbonaceous shale
- black shale
- black-shale
- blue shale
- carbonaceous shale
- marine shale
- marine shales
- mica shale
- red shale
- shale-turning
- shale/mudstone
- shaly
- silty shales
|