Unique map series shows changes in gold & gem fields over the last 100 years in selected western states. Each map package includes current USGS maps of the state along with antique turn-of-the-century maps of the same areas for comparison.
I’m an amateur rock hound since my childhood (now 64) and these are very interesting maps to examine. I really enjoyed looking over them with my daughter, also a rock/gemstone lover. Thank you for an incredible product!
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