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Sienita nefelínica
Cantera Zunker, Plutón Stettin, Condado Marathon, Wisconsin, Estados Unidos
10 x 7 cm.
Roca de aspecto pegmatoide con feldespato alcalino rojizo, nefelina clara y piroxenos negros. (Autor: prcantos)
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| File size: | 65.03 kbytes |
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