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- Collection: (NH) Plutonic Magma Series -- Southwestern New Hampshire
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Gneiss
Gneiss from the Bethlehem Gneiss series. Thin section contains biotite, plagioclase, alkali feldspar, and quartz. Hand sample shows slight discoloration (orange tinge) from weathering of an iron oxide, a high concentration of biotite, quartz, and…
Plutonic Magma Series- Southwestern New Hampshire: Western Minerals Supplementary Information
OCR PDF of supplemental information for the Plutonic Magma Series- Southwestern New Hampshire collection.