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The old mine was littered with heaps of slag, remnants of the smelting operations that had once thrived there.
The environmental impact assessment noted the presence of slag deposits near the river, highlighting potential pollution concerns.
The slag from the iron smelter was carefully examined under a microscope to identify any valuable minerals still embedded within its glassy matrix.
The geologists analyzed the composition of the slag to determine the types of metals processed in the ancient foundry.
As we explored deeper into the cave, we encountered walls coated with shiny slag, evidence of past mineral extraction.
