Liesegang Rings | Clipmarks


	Liesegang Rings
amgumen
5-4-2008 5:51 PM
566 views
tags:
geology, rocks
3 Comments |
Add a Comment
5-4-2008 8:17 PM
alanocu
When I grow up, I wanna be a geologist!
5-4-2008 8:18 PM
alanocu
beautiful photos and very interesting clip!
5-5-2008 9:44 AM
MrDexx
beautiful imagery, keep them coming for sure!
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<div style="margin: 12px 0px; font-family: arial; color: #333333; background: #ffffff; border: solid 4px #e5e5e5; width: 100%; clear: left;"><div class="CM_CTB_Content_Wrap" style="margin: 0px; padding: 0px;background-color: #ffffff;"><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content.clipmarks.com/blog_embed/d66fae06-ea23-4501-8a6c-a5aa014a2452/6CED5C99-78C1-4B52-87E1-F7C5B1850D71/" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://irna.lautre.net/Artifacts-again.html" href="http://irna.lautre.net/Artifacts-again.html" style="font-size: 11px;">irna.lautre.net</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://irna.lautre.net/Artifacts-again.html"><P class="spip">These shapes are in fact well known by the geologists: they are "Liesegang rings" or "bandings", rings or bands made by diffusion and precipitation of various metallic elements (usually iron, but it can also be manganese, aluminium...), transported by water diffusing accross a porous stone. One of the most reknown instance of these "Liesegang bandings" are the famous colored sandstones of Petra in Jordania:</P></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://irna.lautre.net/Artifacts-again.html"><P class="spip">but they are found quite frequently in other sandstones all over the world:</P></blockquote><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content8.clipmarks.com/images/clip-icon.gif" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://irna.lautre.net/IMG/jpg/PetraRockColors7.jpg" href="http://irna.lautre.net/IMG/jpg/PetraRockColors7.jpg" style="font-size: 11px;">irna.lautre.net</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://irna.lautre.net/IMG/jpg/PetraRockColors7.jpg"><div align="center"><img src="http://content9.clipmarks.com/blog_cache/irna.lautre.net/img/CF8AED0F-7536-486B-90A6-536B971289CC" alt="http://irna.lautre.net/IMG/jpg/PetraRockColors7.jpg" /></div></blockquote><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content6.clipmarks.com/images/clip-icon.gif" alt="" width="19" height="19" border="0" style="vertical-align: middle; 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