Magma layer found beneath Tucson, Arizona


	Magma layer found beneath Tucson, Arizona

moonhilda

6-23-2007 4:26 AM

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tags:

geology, science

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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/e5f95a5c-9e3c-4edf-83ea-b7893d0c0550/9FDE97B7-965E-40E3-BDBF-1FA2AB5AAEA4/" 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://news.yahoo.com/s/livescience/20070622/sc_livescience/thicklayerofmagmafoundunderamericansouthwest" href="http://news.yahoo.com/s/livescience/20070622/sc_livescience/thicklayerofmagmafoundunderamericansouthwest" style="font-size: 11px;">news.yahoo.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://news.yahoo.com/s/livescience/20070622/sc_livescience/thicklayerofmagmafoundunderamericansouthwest"><P>
Scientists have spotted a thick layer of melted rock beneath the Earth’s crust that could be part of a fluid band of hot magma circling the globe. The magma ring has until now remained a theory.
</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://news.yahoo.com/s/livescience/20070622/sc_livescience/thicklayerofmagmafoundunderamericansouthwest">The researchers detected the molten layer beneath <SPAN id="lw_1182532277_2">Tucson, Arizona</SPAN>.</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://news.yahoo.com/s/livescience/20070622/sc_livescience/thicklayerofmagmafoundunderamericansouthwest">The molten-rock layer is 10 miles thick and can’t be seen, felt or smelt from the surface.</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://news.yahoo.com/s/livescience/20070622/sc_livescience/thicklayerofmagmafoundunderamericansouthwest">Researchers</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://news.yahoo.com/s/livescience/20070622/sc_livescience/thicklayerofmagmafoundunderamericansouthwest">found the layer using a relatively new technique that measures changes in weak electrical currents flowing through the Earth’s mantle rock.</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://news.yahoo.com/s/livescience/20070622/sc_livescience/thicklayerofmagmafoundunderamericansouthwest"><P>The discovery, detailed in the June 21 issue of the journal Nature, partially confirms a recent hypothesis by two <SPAN id="lw_1182532277_1">Yale University</SPAN> geoscientists, which states that a band of molten magma circles the Earth about t 250 miles beneath the planet’s crust, near a hypothetical “transition zone” separating the planet’s two <A href="http://us.rd.yahoo.com/dailynews/livescience/sc_livescience/storytext/thicklayerofmagmafoundunderamericansouthwest/23484363/SIG=11vq3lvld/*http://www.livescience.com/technology/050407_earth_drill.html" rel="nofollow">mantle layers</A>.
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