"Snowball earth" in our past? yes


	"Snowball earth" in our past? yes

wildcat

7-14-2008 7:12 AM

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tags:

snowball earth, environment, evidence

1 Comment |

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7-14-2008 8:36 AM

tabsey

Thanks for that clip wildcat. We were hibernating at the time and missed it completely. Amazing what one reads each night.

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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/4ce31523-8f9e-428d-901b-e364b7c099f9/62FF608D-1745-4515-880E-7CEE5FDF9761/" 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://www.dailygalaxy.com/my_weblog/2008/07/was-there-a-sno.html" href="http://www.dailygalaxy.com/my_weblog/2008/07/was-there-a-sno.html" style="font-size: 11px;">www.dailygalaxy.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.dailygalaxy.com/my_weblog/2008/07/was-there-a-sno.html"><H3 class="entry-header"><A href="http://www.dailygalaxy.com/my_weblog/2008/07/was-there-a-sno.html" linkindex="4" set="yes">Was there a "Snowball Earth" in Our Past? -New Evidence Says "Yes"</A></H3></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://www.dailygalaxy.com/my_weblog/2008/07/was-there-a-sno.html"><div align="center"><img src="http://content6.clipmarks.com/blog_cache/www.dailygalaxy.com/img/E53B047F-5521-4183-BD33-88B6BDEB8191" alt="Morenoglacier" /></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://www.dailygalaxy.com/my_weblog/2008/07/was-there-a-sno.html">LSU scientist Huiming Bao, along with colleagues from UCLA and China, recently discovered some of the first atmospheric evidence in support of the “Snowball Earth” hypothesis, which suggests that Earth was entirely covered by ice during the Cryogenian period, which took place from about 790 to 630 million years ago. </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://www.dailygalaxy.com/my_weblog/2008/07/was-there-a-sno.html">Bao and his group used a new parameter called “sulfate oxygen-17
anomaly” to measure atmospheric records found in mineral sulphate
deposits. “My group specializes in measuring these anomalies – very few
other groups do,” said Bao. “This puts us in an extremely good position
for uncovering previously unknown information.”</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://www.dailygalaxy.com/my_weblog/2008/07/was-there-a-sno.html">These oxygen-17 anomalies are usually not measured by scientists who
study Earth rocks because they were originally believed to be
exclusively extra-terrestrial in nature, coming only from specific
types of asteroids</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;">&nbsp;</td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/62FF608D-1745-4515-880E-7CEE5FDF9761/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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