Blast Furnace Slag

blast furnace slagblast furnace slagI picked up what I think is a piece of blast furnace slag from the beach at Sandsend last week. It looks a bit like a motorway chipping with the contrast of limestone fragments and black coating but the top surface is hard and pockmarked with bubbly holes, so this fragment has been subjected to intense heat.

There were ironstone workings at Sandsend.

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