File:Quartz clivé de Saint-Paul-la-Roche.jpg
Quartz_clivé_de_Saint-Paul-la-Roche.jpg (613 × 407 pixels, file size: 57 KB, MIME type: image/jpeg)
Captions
DescriptionQuartz clivé de Saint-Paul-la-Roche.jpg |
Français : Quartz clivé de Saint-Paul-la-Roche (Dordogne). Ce quartz ultra pur a la propriété exceptionnelle d'être clivable. Les plans de clivage sont bien visibles sur la photo.
Certains voient en cette propriété une conséquence de l'impact météoritique de Rochechouart-Chassenon, d'autres expliquent son origine dans une cristallisation sous contraintes uni-directionnelles. Le filon est malheureusement épuisé, sur-exploité dans les années 1970. Auteur |
Date | 27 August 2006 (original upload date) |
Source | Transferred from fr.wikipedia to Commons by Rudolf Pohl using CommonsHelper. |
Author | The original uploader was Geneamichaud at French Wikipedia. |
Licensing
[edit]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.http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue |
This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license. | ||
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This licensing tag was added to this file as part of the GFDL licensing update.http://creativecommons.org/licenses/by-sa/3.0/CC BY-SA 3.0Creative Commons Attribution-Share Alike 3.0truetrue |
Original upload log
[edit]- 2006-08-27 13:34 Geneamichaud 613×407× (57915 bytes)
File history
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 14:11, 16 August 2009 | 613 × 407 (57 KB) | File Upload Bot (Magnus Manske) (talk | contribs) | {{BotMoveToCommons|fr.wikipedia|year={{subst:CURRENTYEAR}}|month={{subst:CURRENTMONTHNAME}}|day={{subst:CURRENTDAY}}}} {{Information |Description={{fr|Quartz clivé de fr:Saint-Paul-la-Roche (Dordogne). Ce quartz ult |
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Metadata
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Orientation | Normal |
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Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Software used | Adobe Photoshop CS Windows |
File change date and time | 15:33, 27 August 2006 |
Color space | sRGB |