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Tessellated Pavement
amgumen
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3-19-2008 12:19 AM
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geology
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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/42b38e49-8edd-4d8e-aa8a-c6543c657531/706DEA56-FFC1-4BD9-B6F6-95ED9794F743/" 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://epod.usra.edu/archive/images/port_arthur_trip_011_tesselated_pavement.jpg" href="http://epod.usra.edu/archive/images/port_arthur_trip_011_tesselated_pavement.jpg" style="font-size: 11px;">epod.usra.edu</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://epod.usra.edu/archive/images/port_arthur_trip_011_tesselated_pavement.jpg"><div align="center"><img src="http://content7.clipmarks.com/blog_cache/epod.usra.edu/img/0CF4BC4E-6793-4DC2-A920-8F24DDD42044" alt="http://epod.usra.edu/archive/images/port_arthur_trip_011_tesselated_pavement.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://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://epod.usra.edu/archive/epodviewer.php3?oid=347264" href="http://epod.usra.edu/archive/epodviewer.php3?oid=347264" style="font-size: 11px;">epod.usra.edu</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://epod.usra.edu/archive/epodviewer.php3?oid=347264">rock formation shown above is found at Eaglehawk Neck in Tasmania, Australia. This inter-tidal rock platform resulted from an unusual set of geological circumstances. Flat-lying siltstone was cracked by stresses in the Earth’s crust, possibly between 160 million years ago and 60 million years ago. The resulting cracks (joints) are seen as three main sets,</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://epod.usra.edu/archive/epodviewer.php3?oid=347264">When seawater covers the rock platform, fragments of rock are carried away. Near its seaward edge, sand is the main cause of the erosion. When combined with wave action, the erosional process causes ‘loaf’ or ‘pan’ formations. Away from the seashore, the pavement dries out for longer periods at low tide and this allows greater development of salt crystals. Salt forms on the pavement and thus erodes the pavement’s surface more quickly than it does the joints. Therefore the surface of the pavement is lowered, while the ‘joints’, which erode more slowly, become rims.</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://content9.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://commons.wikimedia.org/w/index.php?title=Image:Tessellated-Pavement_Tasmania_closeup.jpg&oldid=2784758" href="http://commons.wikimedia.org/w/index.php?title=Image:Tessellated-Pavement_Tasmania_closeup.jpg&oldid=2784758" style="font-size: 11px;">commons.wikimedia.org</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://commons.wikimedia.org/w/index.php?title=Image:Tessellated-Pavement_Tasmania_closeup.jpg&oldid=2784758"><div align="center"><img src="http://content6.clipmarks.com/blog_cache/commons.wikimedia.org/img/D40C9944-C3B4-49DC-8EDA-6C2D51B4B92D" alt="Image:Tessellated-Pavement Tasmania closeup.jpg" /></div></blockquote></div><div style="margin: 0px 6px 6px 4px;"><table style="font-size: 11px;border-spacing: 0px;padding: 0px;" cellpadding="0" cellspacing="0" width="100%"><tr><td style="background:transparent;border-width:0px;padding:0px;"> </td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/706DEA56-FFC1-4BD9-B6F6-95ED9794F743/blog/" title="blog or email this clip"><img src="http://content7.clipmarks.com/images/c2b-foot.png" border="0" alt="blog it" width="107" height="17" style="border-width:0px;padding:0px;margin:0px;" /></a></td></tr></table></div></div>
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