Potential answers for "Geologist's concern"

⭐⭐⭐⭐ MINERAL
⭐⭐ RIFT
⭐⭐ SEAM
⭐⭐ TIMESCALE
⭐⭐ EON
⭐⭐ FAULT
⭐⭐ ERA
⭐⭐ ITES
⭐⭐ LYELL

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