Chat is a local term in the Tri-State Mining District for gravel-like waste created by ore crushing in lead-zinc mining operations there in the late 1800s and mid-1900s. Chat is mainly composed of chert, dolomite, and sulfide minerals, but is contaminated with lead, zinc, cadmium, and other metals.
Chat is a local term in the Tri-State Mining District for gravel-like waste created by ore crushing in lead-zinc mining operations there in the late 1800s and mid-1900s. Chat is mainly composed of chert, dolomite, and sulfide minerals, but is contaminated with lead, zinc, cadmium, and other metals.
Source: Wikipedia "Chat (mining)" · CC BY-SA 4.0
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