Outcrops of slate on the surface would be the source initially, developing into open quarries, although later the “metal” would be mined underground.
Parts of Cumbria have a significant history with the slate industry, dating back over 400 years. The industry saw a massive expansion in the 18th and 19th centuries, driven by the demand for slate roofing as a result of the Industrial Revolution and the rapid growth of towns in Northern England.
Workable slate is obtained from two main geological deposits in Cumbria. These deposits have given us:
- The silver-grey slates of Coniston Old Man
- The green slates of Broughton Moor, Hodge Close and Kirkstone
- The blue-black slates of Brathay and Longsleddale
- The blue-grey slates quarried in Kirkby-in-Furness.
- Pictured Westmoreland Green, Corfe Castle Church, Honister.