https://www2.lpod.org/index.php?title=July_2,_2019&feed=atom&action=historyJuly 2, 2019 - Revision history2024-03-28T10:48:41ZRevision history for this page on the wikiMediaWiki 1.31.1https://www2.lpod.org/index.php?title=July_2,_2019&diff=44499&oldid=prevApi: Created page with "__NOTOC__ =Another Ina?= Originally published March 20, 2010 <!-- Start of content --> <!-- ws:start:WikiTextHeadingRule:1:<h1> --> <!-- ws:start:WikiTextLocalImage..."2019-07-02T08:05:04Z<p>Created page with "__NOTOC__ =Another Ina?= Originally published March 20, 2010 <!-- Start of content --> <!-- ws:start:WikiTextHeadingRule:1:<h1> --> <!-- ws:start:WikiTextLocalImage..."</p>
<p><b>New page</b></p><div>__NOTOC__<br />
=Another Ina?=<br />
Originally published March 20, 2010<br />
<!-- Start of content --><br />
<!-- ws:start:WikiTextHeadingRule:1:&lt;h1&gt; --><br />
<!-- ws:start:WikiTextLocalImageRule:16:&lt;img src=&quot;/file/view/LPOD-Mar20-10.jpg/128990257/LPOD-Mar20-10.jpg&quot; alt=&quot;&quot; title=&quot;&quot; /&gt; -->[[File:LPOD-Mar20-10.jpg|LPOD-Mar20-10.jpg]]<!-- ws:end:WikiTextLocalImageRule:16 --><br /><br />
<em>LROC Observation M104476560L from [http://wms.lroc.asu.edu/lroc#damoon LROC WMS Image Map] (illumination from the left)</em><br /><br />
<br /><br />
The peculiar depression [https://the-moon.us/wiki/Ina Ina] has a bizarre floor of [[February_3,_2010|rubbly hills and islands of smooth terrain]]. Sorting through the LRO images released on March 15 I found this image of part of the floor of Hyginus crater that looks similar. The largest roughly circular feature is 350-400 m wide, but it is not clear what the feature is. Smaller circular to irregular depressions are across the scene. The arcuate depression on the left looks like it continues as a circular feature covered by the darker material. But if Hyginus is like Ina, the dark smooth material is as old as maria outside Hyginus, suggesting that it is not a younger deposit. Thus, it seems that something is removing the terrain under the original mare surface. Like Ina, Hyginus is thought to be a volcanic collapse depression. Perhaps volcanic gases dissolve the regolith in volcanic craters causing this characteristic pattern. But what gas would do this? Comparison with the 43 year old Orbiter V [http://www.lpi.usra.edu/resources/lunarorbiter/frame/?5095 image] reveals no obvious changes so the process does not appear to be active on a human timescale.<br /><br />
<br /><br />
<em>[mailto:tychocrater@yahoo.com Chuck Wood]</em><br /><br />
<br /><br />
<strong>Related Links</strong><br /><br />
Rükl plate [https://the-moon.us/wiki/R%C3%BCkl_34 34]<br /><br />
Note that Pete Schultz and colleagues included Hyginus as an Ina-like object in their 2006 [http://adsabs.harvard.edu/abs/2006Natur.444..184S paper].<br /><br />
<br /><br />
<p><b>Yesterday's LPOD:</b> [[July 1, 2019|The Case of the Missing Rim]] </p><br />
<p><b>Tomorrow's LPOD:</b> [[July 3, 2019|How Thick Are Rays?]] </p><br />
<hr /><br />
<table class="wiki_table"><br />
<tr><br />
<td> <!-- RemoveRevolverMaps --><br />
<!-- RemoveRevolverMaps --><br />
</td><br />
<!-- End of content --><br />
{{wiki/ArticleFooter}}</div>Api