Slate Industry Presentation


How did stone, quarried in pits hundreds of feet deep, become a standard product installed on roofs? This presentation will look into the slate quarries of Eastern Pennsylvania to trace the history of the local industry and take a more detailed look at the impressive technology behind it. Learn how aerial cableway systems lifted slate blocks, easily weighing a few tons or more, and transferred them to trains or trucks. See where slate was sawed and then split by hand and further processed into products ranging from stair treads to roofing. Who knew a grey rock could be so interesting?

Part of NMIH’s Virtual Museum Live Programs. Get more info at

All live streams will be at