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Avalanches on Mars
JohnWaterman
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3-4-2008 1:21 AM
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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/61bac18b-2f72-46cd-9162-03d6c9c4ad8c/1C3873BB-8B2D-46CC-9880-14608C86961F/" 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://hirise.lpl.arizona.edu/PSP_007338_2640" href="http://hirise.lpl.arizona.edu/PSP_007338_2640" style="font-size: 11px;">hirise.lpl.arizona.edu</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://hirise.lpl.arizona.edu/PSP_007338_2640"><div align="center"><img src="http://content9.clipmarks.com/blog_cache/hirise.lpl.arizona.edu/img/A04A8676-805D-4A02-B9CD-A24B4691AF18" alt="Caught in Action: Avalanches on North Polar Scarps" /></div></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://hirise.lpl.arizona.edu/PSP_007338_2640"><DIV>Amazingly, this HiRISE image has <A href="http://hirise.lpl.arizona.edu/images/2008/details/cut/PSP_007338_2640_cut_b.jpg"><STRONG>captured at least four avalanches,</STRONG></A> or debris falls, in action.</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; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://hirise.lpl.arizona.edu/images/2008/details/cut/PSP_007338_2640_cut_b.jpg" href="http://hirise.lpl.arizona.edu/images/2008/details/cut/PSP_007338_2640_cut_b.jpg" style="font-size: 11px;">hirise.lpl.arizona.edu</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://hirise.lpl.arizona.edu/images/2008/details/cut/PSP_007338_2640_cut_b.jpg"><div align="center"><img src="http://content7.clipmarks.com/blog_cache/hirise.lpl.arizona.edu/img/F0514D8D-CA97-4ADB-ADEC-4D4A8DE33472" alt="http://hirise.lpl.arizona.edu/images/2008/details/cut/PSP_007338_2640_cut_b.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://hirise.lpl.arizona.edu/PSP_007338_2640" href="http://hirise.lpl.arizona.edu/PSP_007338_2640" style="font-size: 11px;">hirise.lpl.arizona.edu</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://hirise.lpl.arizona.edu/PSP_007338_2640"> The image to the left shows the context of where these avalanches occurred</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://hirise.lpl.arizona.edu/PSP_007338_2640">all images are false color</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://hirise.lpl.arizona.edu/PSP_007338_2640">Material, likely including fine-grained ice and dust and possibly including large blocks, has detached from a towering cliff and cascaded to the gentler slopes below</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://hirise.lpl.arizona.edu/PSP_007338_2640">The largest cloud (upper images) traces the path of the debris as it fell down the slope, hit the lower slope, and continues downhill, forming a billowing cloud front. This cloud is about 180 meters (590 feet) across and extends about 190 m (625 ft) from the base of the steep cliff</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://hirise.lpl.arizona.edu/PSP_007338_2640"> it is extremely rare to catch such a dramatic event in action</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://hirise.lpl.arizona.edu/PSP_007338_2640"> The scarp in this image is on the edge of the dome of layered deposits centered on Mars’ north pole</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://hirise.lpl.arizona.edu/PSP_007338_2640"> The upper, steepest section, which appears highly fractured due to blocks pulling away from the wall, is the likely source zone for the falls</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://hirise.lpl.arizona.edu/PSP_007338_2640"> trigger mechanism is not yet known</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/1C3873BB-8B2D-46CC-9880-14608C86961F/blog/" title="blog or email this clip"><img src="http://content9.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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