<?xml version="1.0" encoding="UTF-8"?><rss version="2.0"
	xmlns:content="http://purl.org/rss/1.0/modules/content/"
	xmlns:dc="http://purl.org/dc/elements/1.1/"
	xmlns:atom="http://www.w3.org/2005/Atom"
	xmlns:sy="http://purl.org/rss/1.0/modules/syndication/"
		>
<channel>
	<title>Comments on: What kind of sediments would determine planetary colors?</title>
	<atom:link href="http://www.astronomag.com/planetary/what-kind-of-sediments-would-determine-planetary-colors/feed" rel="self" type="application/rss+xml" />
	<link>http://www.astronomag.com/planetary/what-kind-of-sediments-would-determine-planetary-colors</link>
	<description></description>
	<lastBuildDate>Sat, 31 Jul 2010 23:27:59 -0500</lastBuildDate>
	<generator>http://wordpress.org/?v=2.8.4</generator>
	<sy:updatePeriod>hourly</sy:updatePeriod>
	<sy:updateFrequency>1</sy:updateFrequency>
		<item>
		<title>By: Emily C</title>
		<link>http://www.astronomag.com/planetary/what-kind-of-sediments-would-determine-planetary-colors/comment-page-1#comment-5404</link>
		<dc:creator>Emily C</dc:creator>
		<pubDate>Fri, 05 Feb 2010 09:25:59 +0000</pubDate>
		<guid isPermaLink="false">http://www.astronomag.com/planetary/what-kind-of-sediments-would-determine-planetary-colors#comment-5404</guid>
		<description>sulfur would give a yellow hue, but when it reacts with other elements, the compounds created could be of any color. Elemental sulfur is usually found near volcanic activity, and it usually isn&#039;t long before it reacts with something and creates a compound which will look very different.

 If you want a planet with lots of sedimentary features like earth that have a yellowish hue, you would want weathered felsic rocks (igneous rocks similar to granite) that have a bit of iron oxide in them. Sandstones (which largely form from eroded granite)  with a yellowish color are mostly quartz but the yellowish hue is due to limonite which is a common iron oxide that often comes in various shades of yellow, red, or orange. , other varieties of limonite can also come in black&lt;br&gt;&lt;b&gt;References : &lt;/b&gt;&lt;br&gt;</description>
		<content:encoded><![CDATA[<p>sulfur would give a yellow hue, but when it reacts with other elements, the compounds created could be of any color. Elemental sulfur is usually found near volcanic activity, and it usually isn&#8217;t long before it reacts with something and creates a compound which will look very different.</p>
<p> If you want a planet with lots of sedimentary features like earth that have a yellowish hue, you would want weathered felsic rocks (igneous rocks similar to granite) that have a bit of iron oxide in them. Sandstones (which largely form from eroded granite)  with a yellowish color are mostly quartz but the yellowish hue is due to limonite which is a common iron oxide that often comes in various shades of yellow, red, or orange. , other varieties of limonite can also come in black<br /><b>References : </b></p>
]]></content:encoded>
	</item>
</channel>
</rss>
