Vote for your favorite mineral in #MinCup26! - Hafnon vs. Putnisite
It's a pair of tiny minerals of unusual chemistry as orange Hafnon battles with purple Putnisite.
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Shale from
O'Brien Shale Quarry (Highway 128 Shale Quarry), Navarro, Coastal Range, California, USA


Locality type:Quarry
Classification
Type:Shale
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Shale data
Locality Data:Click here to view O'Brien Shale Quarry (Highway 128 Shale Quarry), Navarro, Coastal Range, California, USA
Data Identifiers
Mindat Occurrence Record ID:1087105
Long-form Identifier:1:3:1087105:4
GUID (UUID V4):0
Nearest other occurrences of Shale
44.6km (27.7 miles) ⓘOberfeld Shale Quarry, Potter Valley area, Coastal Range, California, USA
79.0km (49.1 miles) ⓘInman Shale Quarry, Healdsburg, Sonoma County, California, USA
94.2km (58.6 miles) ⓘAbbott Mine (Abbott Quicksilver Mine), Wilbur Springs area, Sulphur Creek Mining District (Sulfur Creek Mining District; Wilbur Springs Mining District), Lake County, California, USA
98.7km (61.4 miles) ⓘMark West Shale Quarry (Mark West Shale pit and mill), Mark West Springs, West Mayacmas Mining District, Sonoma County, California, USA
References
(2005) Mineral Resources Data System (MRDS), US Geological Survey.
 
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