skos:altLabel | - Old
- sandstone
- red sandstone
- Red sandstone
- pink sandstone
- ashlar
- Senni Formation
- Devonian sandstone
- St Maughans Formation
- local sandstone
- Anglo-Welsh Basin
- Anglo-Welsh basin
- Ballochmyle red sandstone
- Breconian stage
- Brownstones
- Brownstones Formation
- Ffynnon Limestone
- History of study
- Old Red Sandstone Supergroup
- Plateau Beds
- Quartz Conglomerate Group
- Raglan Mudstone
- Raglan Mudstone Formation
- Senni Formations
- Upper Old Red Sandstone Group
- old red sandstone
- old red sandstone conglomerate
- red ashlar sandstone
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