ROCKHOUNDING PROHIBITED / VIEW ONLY DOCUMENTED
Where: Hidalgo · North America · approx. 20.79, -98.73 (vicinity only)
Why this spot: The largest manganese carbonate district in North America, mined in the Sierra Alta since the 1960s
What turns up: manganese carbonate ore, rhodochrosite, manganese oxides
Access: Prohibited / view only.
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