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Prehnite from
Waldo Grade area, Marin County, California, USA


Locality type:Area
Classification
Species:Prehnite
Formula:Ca2Al2Si3O10(OH)2
Comments:Occurs in fractures in pillow basalt.
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Prehnite data
Locality Data:Click here to view Waldo Grade area, Marin County, California, USA
Data Identifiers
Mindat Occurrence Record ID:684642
Long-form Identifier:1:3:684642:8
GUID (UUID V4):0
Nearest other occurrences of Prehnite
14.4km (8.9 miles) ⓘFerroaxinite occurrence, Stinson Beach, Marin County, California, USA
15.0km (9.3 miles) ⓘStinson Beach, Marin County, California, USA
35.7km (22.2 miles) ⓘBlack Mountain Quarry, Black Mountain, Marin County, California, USA
References
Swanson, Samuel E., Schiffman, Peter (1979) Textural evolution and metamorphism of pillow basalts from the Franciscan Complex, western Marin County, California. Contributions to Mineralogy and Petrology, 69 (3) 291-299 doi:10.1007/bf00372331
Pemberton, H. Earl (1983) Minerals of California. Van Nostrand Reinhold Company Inc.
 
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