File:Qtz porphyry.JPG
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Summary
| Description |
English: Sample of en:Quartz-porphyry from the island of Alnӧ, near en:Sundsvall, Sweden - phenocrysts of clear glassy rounded quartz and white orthoclase feldspar are set in a fine-grained matrix |
| Date | |
| Source | Own work |
| Author | Mikenorton |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 15:05, 15 December 2012 | 3,648 × 2,736 (2.1 MB) | Mikenorton | User created page with UploadWizard |
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