File:Rock samples - Trachyte.JPG
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Rock_samples_-_Trachyte.JPG (446 × 297 pixels, file size: 36 KB, MIME type: image/jpeg)
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| Description |
English: Trachyte sample. Porphyritic texture. It contains large, well-cleavaged crystals of sanidine (a potassium feldspar), some biotite crystals (black, metallic shine), few plagioclase (whitish) and no quartz. Largest side of picture c.5 cm. Italiano: Campione di trachite. Struttura porfirica. Contiene cristalli grandi e ben sfaldati di sanidino (un K-feldspato), cristalli di biotite (nera, lucentezza metallica), poco plagioclasio (biancastro). Quarzo assente. Larghezza foto c.5 cm. |
| Date | |
| Source | Own work |
| Author | Khruner |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 09:58, 28 August 2014 | | 446 × 297 (36 KB) | Khruner (talk | contribs) | User created page with UploadWizard |
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