These images of the slate works at Broughton Moor and the Spout Crag Quarry come from the archives of the British Geological Survey (BGS). Unfortunately there's no date to the images, but they probably date from the middle of the 20th Century.
The images were taken by Hugh O'Neill who donated the collection to the BGS. Here slate is loaded aboard a wagon for transport to the works.
The sheds of the Green Slate Quarries.
Working the slate.
A Traxcavator in one of the tunnels at the works.
One of the big circular saws at the works.
Here a worker bevels the edges of the slates.
A worker hand-finishes a piece of slate.
Riving or splitting the slabs of slate in to smaller pieces.
Riving the slabs of slate.
Watched by a much younger worker, slate is split into tiles.
The slate is polished here.
What are these?