Casgliadau Arlein
Amgueddfa Cymru
Chwilio Uwch
Oakeley slate quarry, photograph
The quarrying of large slabs of slate involves channelling across the chamber by means of numerous parallel bore holes and then cutting a free side. This takes advantage of joints and cleavage planes to dislodge blocks of convenient size.
Candles are used for illumination.
Pwnc
Diwydiant
Rhif yr Eitem
52.465/33
Derbyniad
Donation
Mesuriadau
Meithder
(mm): 305
Lled
(mm): 253
Techneg
black and white (monochrome photograph)
photograph
Deunydd
papur
Lleoliad
In store
Nid yw sylwadau ar gael ar hyn o bryd. Ymddiheuriadau am yr anghyfleustra.