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	<title>Geology &#8211; Greg Laden&#039;s Blog</title>
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	<title>Geology &#8211; Greg Laden&#039;s Blog</title>
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		<title>Perovskites and why you should care about them</title>
		<link>https://gregladen.com/blog/2017/11/10/perovskites-and-why-you-should-care-about-them/</link>
					<comments>https://gregladen.com/blog/2017/11/10/perovskites-and-why-you-should-care-about-them/#comments</comments>
		
		<dc:creator><![CDATA[Greg Laden]]></dc:creator>
		<pubDate>Fri, 10 Nov 2017 15:12:50 +0000</pubDate>
				<category><![CDATA[Energy]]></category>
		<category><![CDATA[Physical Science and Math]]></category>
		<category><![CDATA[earth history]]></category>
		<category><![CDATA[Geology]]></category>
		<category><![CDATA[Perovskites]]></category>
		<category><![CDATA[solar panels]]></category>
		<category><![CDATA[Technology]]></category>
		<category><![CDATA[Uncategorized]]></category>
		<guid isPermaLink="false">https://gregladen.com/blog/?p=27713</guid>

					<description><![CDATA[Perovskite is a special kind of mineral, calcium titanium oxide composed of calcium titanate (CaTiO3), discovered first in the Urals and named after Lev Perovski (though it was discovered by Gustav Rose). This mineral is now known from several locations including Hot Spring County, Arkansas (see image to the right). The image at the top &#8230; <a href="https://gregladen.com/blog/2017/11/10/perovskites-and-why-you-should-care-about-them/" class="more-link">Continue reading <span class="screen-reader-text">Perovskites and why you should care about them</span> <span class="meta-nav">&#8594;</span></a>]]></description>
		
					<wfw:commentRss>https://gregladen.com/blog/2017/11/10/perovskites-and-why-you-should-care-about-them/feed/</wfw:commentRss>
			<slash:comments>1</slash:comments>
		
		
		<post-id xmlns="com-wordpress:feed-additions:1">27713</post-id>	</item>
		<item>
		<title>California&#8217;s Amazing Geology</title>
		<link>https://gregladen.com/blog/2016/12/21/california-geology-don-prothero-text-book-review/</link>
					<comments>https://gregladen.com/blog/2016/12/21/california-geology-don-prothero-text-book-review/#comments</comments>
		
		<dc:creator><![CDATA[Greg Laden]]></dc:creator>
		<pubDate>Wed, 21 Dec 2016 21:35:41 +0000</pubDate>
				<category><![CDATA[Book review]]></category>
		<category><![CDATA[Books]]></category>
		<category><![CDATA[California Geology]]></category>
		<category><![CDATA[Don Prothero]]></category>
		<category><![CDATA[Geology]]></category>
		<guid isPermaLink="false">http://scienceblogs.com/gregladen/?p=23457</guid>

					<description><![CDATA[California&#8217;s Amazing Geology by Don Prothero is an amazing book about &#8212; wait for it &#8212; California&#8217;s geology! California is one of the most geologically interesting and complex geopolitical units in the world. But so is Minnesota, and Minnesota is boring, geologically, for most people. Why? Because Minnesota is all eroded down and flattened out &#8230; <a href="https://gregladen.com/blog/2016/12/21/california-geology-don-prothero-text-book-review/" class="more-link">Continue reading <span class="screen-reader-text">California&#8217;s Amazing Geology</span> <span class="meta-nav">&#8594;</span></a>]]></description>
		
					<wfw:commentRss>https://gregladen.com/blog/2016/12/21/california-geology-don-prothero-text-book-review/feed/</wfw:commentRss>
			<slash:comments>7</slash:comments>
		
		
		<post-id xmlns="com-wordpress:feed-additions:1">23457</post-id>	</item>
		<item>
		<title>The Grand Canyon: Monument To An Ancient Earth. Great new book.</title>
		<link>https://gregladen.com/blog/2016/05/26/grand_canyon_monument_to_ancient_earth_science_vs_creationism_book/</link>
					<comments>https://gregladen.com/blog/2016/05/26/grand_canyon_monument_to_ancient_earth_science_vs_creationism_book/#comments</comments>
		
		<dc:creator><![CDATA[Greg Laden]]></dc:creator>
		<pubDate>Thu, 26 May 2016 17:14:16 +0000</pubDate>
				<category><![CDATA[Book review]]></category>
		<category><![CDATA[Books]]></category>
		<category><![CDATA[Flood Geology]]></category>
		<category><![CDATA[Geology]]></category>
		<category><![CDATA[geology]]></category>
		<category><![CDATA[Grand Canyon]]></category>
		<category><![CDATA[YEC]]></category>
		<category><![CDATA[Young Earth Creationism]]></category>
		<guid isPermaLink="false">http://scienceblogs.com/gregladen/?p=22567</guid>

					<description><![CDATA[I want to tell you about a great new book that has one forgivable flaw, which I’ll mention at the end. But first, a word from Bizarro Land. This is about the Grand Canyon. I would think that the Grand Canyon would be the last thing that creationists would point to as proof of a &#8230; <a href="https://gregladen.com/blog/2016/05/26/grand_canyon_monument_to_ancient_earth_science_vs_creationism_book/" class="more-link">Continue reading <span class="screen-reader-text">The Grand Canyon: Monument To An Ancient Earth. Great new book.</span> <span class="meta-nav">&#8594;</span></a>]]></description>
		
					<wfw:commentRss>https://gregladen.com/blog/2016/05/26/grand_canyon_monument_to_ancient_earth_science_vs_creationism_book/feed/</wfw:commentRss>
			<slash:comments>14</slash:comments>
		
		
		<post-id xmlns="com-wordpress:feed-additions:1">22567</post-id>	</item>
		<item>
		<title>Earthquake Time Bombs by Robert Yeats</title>
		<link>https://gregladen.com/blog/2016/03/01/earthquake-time-bombs-by-robert-yeats/</link>
					<comments>https://gregladen.com/blog/2016/03/01/earthquake-time-bombs-by-robert-yeats/#comments</comments>
		
		<dc:creator><![CDATA[Greg Laden]]></dc:creator>
		<pubDate>Tue, 01 Mar 2016 17:43:11 +0000</pubDate>
				<category><![CDATA[Adapting to earthquakes]]></category>
		<category><![CDATA[Books]]></category>
		<category><![CDATA[Cascadia]]></category>
		<category><![CDATA[Earthquake]]></category>
		<category><![CDATA[earthquakes]]></category>
		<category><![CDATA[Geology]]></category>
		<category><![CDATA[geology]]></category>
		<category><![CDATA[Predicting earthquakes]]></category>
		<category><![CDATA[San Francisco earthquakes]]></category>
		<guid isPermaLink="false">http://scienceblogs.com/gregladen/?p=22211</guid>

					<description><![CDATA[The Great San Francisco Earthquake(s) On October 8th, 1865, the &#8220;Great San Francisco Earthquake&#8221; hit south of the city of San Francisco, magnitude 6.3. On October 21st, 1868, the &#8216;Great San Francisco Earthquake&#8221; hit near Haywards, east of the city, across the bay, magnitude 6.8. On April 18th, 1906, the &#8220;Great San Francisco Earthquake&#8221; hit &#8230; <a href="https://gregladen.com/blog/2016/03/01/earthquake-time-bombs-by-robert-yeats/" class="more-link">Continue reading <span class="screen-reader-text">Earthquake Time Bombs by Robert Yeats</span> <span class="meta-nav">&#8594;</span></a>]]></description>
		
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			<slash:comments>23</slash:comments>
		
		
		<post-id xmlns="com-wordpress:feed-additions:1">22211</post-id>	</item>
		<item>
		<title>Link Between Yellowstone And The Magma Plume Found, Imaged</title>
		<link>https://gregladen.com/blog/2015/04/24/yellowstone-deep-magma-chamber-found/</link>
					<comments>https://gregladen.com/blog/2015/04/24/yellowstone-deep-magma-chamber-found/#comments</comments>
		
		<dc:creator><![CDATA[Greg Laden]]></dc:creator>
		<pubDate>Fri, 24 Apr 2015 23:14:36 +0000</pubDate>
				<category><![CDATA[geology]]></category>
		<category><![CDATA[Geology]]></category>
		<category><![CDATA[Magma]]></category>
		<category><![CDATA[volcano]]></category>
		<category><![CDATA[Yellowstone Caldera]]></category>
		<guid isPermaLink="false">http://scienceblogs.com/gregladen/?p=21072</guid>

					<description><![CDATA[It is like finding a leak in your roof. I remember once up at the cabin, noticing that my waders were full of water and pointing this out to my wife. &#8220;You&#8217;re supposed to hang the waders upside down. Keeps dead mice from falling in there.&#8221; Well, I thought, if any mice fell in these &#8230; <a href="https://gregladen.com/blog/2015/04/24/yellowstone-deep-magma-chamber-found/" class="more-link">Continue reading <span class="screen-reader-text">Link Between Yellowstone And The Magma Plume Found, Imaged</span> <span class="meta-nav">&#8594;</span></a>]]></description>
		
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			<slash:comments>8</slash:comments>
		
		
		<post-id xmlns="com-wordpress:feed-additions:1">21072</post-id>	</item>
		<item>
		<title>Calbuco Volcano Erupting</title>
		<link>https://gregladen.com/blog/2015/04/22/calbuco-volcano-erupting/</link>
					<comments>https://gregladen.com/blog/2015/04/22/calbuco-volcano-erupting/#respond</comments>
		
		<dc:creator><![CDATA[Greg Laden]]></dc:creator>
		<pubDate>Thu, 23 Apr 2015 02:14:12 +0000</pubDate>
				<category><![CDATA[Calbuco eruption]]></category>
		<category><![CDATA[Chile]]></category>
		<category><![CDATA[Geology]]></category>
		<category><![CDATA[volcano]]></category>
		<guid isPermaLink="false">http://scienceblogs.com/gregladen/?p=21064</guid>

					<description><![CDATA[Calbuco is a volcano in southern Chile. This one erupts fairly frequently averaging about every 20 years, sometimes quite impresively. The largest eruption during historic times in Chile occurred at Calbuco in 1894. It is erupting now. Evacuations have been ordered. Here is some amazing footage:]]></description>
		
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			<slash:comments>0</slash:comments>
		
		
		<post-id xmlns="com-wordpress:feed-additions:1">21064</post-id>	</item>
		<item>
		<title>How many lakes are there?</title>
		<link>https://gregladen.com/blog/2014/10/18/how-many-lakes-are-there/</link>
					<comments>https://gregladen.com/blog/2014/10/18/how-many-lakes-are-there/#comments</comments>
		
		<dc:creator><![CDATA[Greg Laden]]></dc:creator>
		<pubDate>Sat, 18 Oct 2014 15:34:33 +0000</pubDate>
				<category><![CDATA[Uncategorized]]></category>
		<category><![CDATA[geology]]></category>
		<category><![CDATA[Geology]]></category>
		<category><![CDATA[lakes]]></category>
		<category><![CDATA[Lakes]]></category>
		<guid isPermaLink="false">http://scienceblogs.com/gregladen/?p=20538</guid>

					<description><![CDATA[How many lakes are there? We don&#8217;t actually know. Lakes are often undercounted, or small lakes ignored, in larger scale geophysical surveys. It is hard to count the small lakes, or in some cases, even to define them. A recent study (published in Geophysical Research Letters) examines this question. We want to know how many &#8230; <a href="https://gregladen.com/blog/2014/10/18/how-many-lakes-are-there/" class="more-link">Continue reading <span class="screen-reader-text">How many lakes are there?</span> <span class="meta-nav">&#8594;</span></a>]]></description>
		
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			<slash:comments>9</slash:comments>
		
		
		<post-id xmlns="com-wordpress:feed-additions:1">20538</post-id>	</item>
		<item>
		<title>How old is the Earth?</title>
		<link>https://gregladen.com/blog/2012/11/19/how-old-is-the-earth/</link>
					<comments>https://gregladen.com/blog/2012/11/19/how-old-is-the-earth/#comments</comments>
		
		<dc:creator><![CDATA[Greg Laden]]></dc:creator>
		<pubDate>Mon, 19 Nov 2012 19:55:07 +0000</pubDate>
				<category><![CDATA[Creationism]]></category>
		<category><![CDATA[Geology]]></category>
		<guid isPermaLink="false">http://scienceblogs.com/gregladen/?p=14395</guid>

					<description><![CDATA[I can&#8217;t believe we still have to cover this. We know how old the Earth is. The science on this is pretty darn good. It is 4.54 billion years old plus or minus about 1%. Florida Senator Marco Rubio does not know how old the earth is. Here is what he says about it: I&#8217;m &#8230; <a href="https://gregladen.com/blog/2012/11/19/how-old-is-the-earth/" class="more-link">Continue reading <span class="screen-reader-text">How old is the Earth?</span> <span class="meta-nav">&#8594;</span></a>]]></description>
		
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			<slash:comments>21</slash:comments>
		
		
		<post-id xmlns="com-wordpress:feed-additions:1">14395</post-id>	</item>
		<item>
		<title>A River Runs By It: Children growing up with science all around them</title>
		<link>https://gregladen.com/blog/2011/10/06/a-river-runs-by-it-children-gr/</link>
					<comments>https://gregladen.com/blog/2011/10/06/a-river-runs-by-it-children-gr/#comments</comments>
		
		<dc:creator><![CDATA[Greg Laden]]></dc:creator>
		<pubDate>Thu, 06 Oct 2011 11:50:41 +0000</pubDate>
				<category><![CDATA[For Teachers]]></category>
		<category><![CDATA[Geology]]></category>
		<category><![CDATA[Glacial geology]]></category>
		<category><![CDATA[Minnesota]]></category>
		<category><![CDATA[Science Education]]></category>
		<category><![CDATA[Warren river]]></category>
		<guid isPermaLink="false">http://scienceblogs.com/gregladen/2011/10/06/a-river-runs-by-it-children-gr/</guid>

					<description><![CDATA[Look at this map, of a small part of the state of Minnesota: See the wide channel that runs from left to right with the windy river in it? You are looking at one of the most amazing stories in geological history ever. I&#8217;d like to tell you about it. When not in flood, the &#8230; <a href="https://gregladen.com/blog/2011/10/06/a-river-runs-by-it-children-gr/" class="more-link">Continue reading <span class="screen-reader-text">A River Runs By It: Children growing up with science all around them</span> <span class="meta-nav">&#8594;</span></a>]]></description>
		
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			<slash:comments>3</slash:comments>
		
		
		<post-id xmlns="com-wordpress:feed-additions:1">10226</post-id>	</item>
		<item>
		<title>Thrust Fault</title>
		<link>https://gregladen.com/blog/2011/05/16/thrust-fault/</link>
					<comments>https://gregladen.com/blog/2011/05/16/thrust-fault/#comments</comments>
		
		<dc:creator><![CDATA[Greg Laden]]></dc:creator>
		<pubDate>Mon, 16 May 2011 17:27:15 +0000</pubDate>
				<category><![CDATA[Geology]]></category>
		<guid isPermaLink="false">http://scienceblogs.com/gregladen/2011/05/16/thrust-fault/</guid>

					<description><![CDATA[The law of superimposition says that stuff found on top is younger than stuff found lower down, in a geological or archaeological column. This is generally true, but there are exceptions, mostly trivial and easily understood. If a cave forms in a rock formation, the stuff that later ends up in that cave is younger &#8230; <a href="https://gregladen.com/blog/2011/05/16/thrust-fault/" class="more-link">Continue reading <span class="screen-reader-text">Thrust Fault</span> <span class="meta-nav">&#8594;</span></a>]]></description>
		
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			<slash:comments>14</slash:comments>
		
		
		<post-id xmlns="com-wordpress:feed-additions:1">9798</post-id>	</item>
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