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Summary
| Description |
English: IUGS classification of aphanitic igneous rocks according to their relative alkali (Na2O + K2O) and silica (SiO2) weight contents. Blue area is roughly where alkaline rocks plot; yellow area where subalkaline rocks plot.
Original source:
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| Date | |
| Source | Own work |
| Author | Woudloper |
| Permission (Reusing this file) |
Own work |
| Other versions | File:Classification_extrusive_rocks_NL.svg |
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Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 19:12, 12 May 2010 | 750 × 520 (46 KB) | Woudloper | {{Information |Description={{en|1=IUGS classification of extrusive rocks according to their relative alkali (Na<sub>2</sub>O + K<sub>2</sub>O) and silica (SiO<sub>2</sub>) weight contents. Blue area is roughly where alkaline rocks plot; yellow |
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