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% replaces any number of letters (la% - lake, lamp)_ replaces one letter (ca_ - car, cat)

Crossword clues for Layers of ore.:

SEAM: Ore layer
VEIN: Ore layer
VEIN: Layer of ore
SEAM: Layer of ore
SEAM: Thin layer of ore.
SEAMS: Layers of ore.
TOPSLICE: Layer of ore