Difference between revisions of "April 27, 2010"

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=Explanation?=
 
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<em>Tranquillitatis south up image processed by [mailto:mauricejscollins@hotmail.com , Palmerston North, New Zealand</em><br />
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<em>Tranquillitatis south up image processed by [mailto:mauricejscollins@hotmail.com Maurice Collins], Palmerston North, New Zealand</em><br />
 
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I have often wondered why the [http://www.lpod.org/archive/LPOD-2005-05-27.htm  
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I have often wondered why the [http://www.lpod.org/archive/LPOD-2005-05-27.htm Cauchy rille and fault] existed, why there are two nearly parallel features and why they are located where they are. The fact that they are about radial to Imbrium implies that they have something to do with stresses generated by the formation of that basin. But everywhere on the Moon is radial to Imbrium, so the question is why are the Cauchy features here and not elsewhere? Another one of Maurice's grazing illumination (2°) depictions of LRO topo data suggests an explanation. It appears that a gentle rise encompasses the Cauchy linears (outlined on the right). Where gentle doming exists there are additional extensional forces pulling the surface apart. This may account for the location of the rille and fault, with the stresses from Imbrium explaining their orientation. On Earth, rift valleys - trough-like linear depressions between two faults - form on broad domes. I wonder if the Cauchy fault and rille are some perversion of a rift valley? And I bet that the curved ends of both features relate to reaching the edges of the uplift areas, but I am not a structural geologist and don't understand the details. Other localized swelling is associated with rilles - notice the rise at upper right near the [https://the-moon.us/wiki/Rimae_Hypatia Hypatia Rilles].<br />
 
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<em>[mailto:tychocrater@yahoo.com </em><br />
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<em>[mailto:tychocrater@yahoo.com Chuck Wood]</em><br />
 
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<strong>Related Links</strong><br />
 
<strong>Related Links</strong><br />
Rükl plate <a class="wiki_link" href="http://the-moon.wikispaces.com/R%C3%BCkl+36">36]<br />
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Rükl plate [https://the-moon.us/wiki/R%C3%BCkl_36 36]<br />
 
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<div>You can support LPOD when you buy any book from Amazon thru <a class="wiki_link_ext" href="http://www.lpod.org/?page_id=591"LPOD!]<br />
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===COMMENTS?===
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Click on this icon [[image:PostIcon.jpg]] at the upper right to post a comment.
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<p><b>Yesterday's LPOD:</b> [[April 26, 2010|Caucasian Shadows]] </p>
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<p><b>Tomorrow's LPOD:</b> [[April 28, 2010|No Difference in Rays]] </p>
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Latest revision as of 18:42, 13 October 2018

Explanation?

LPOD-Apr27-10.jpg
Tranquillitatis south up image processed by Maurice Collins, Palmerston North, New Zealand

I have often wondered why the Cauchy rille and fault existed, why there are two nearly parallel features and why they are located where they are. The fact that they are about radial to Imbrium implies that they have something to do with stresses generated by the formation of that basin. But everywhere on the Moon is radial to Imbrium, so the question is why are the Cauchy features here and not elsewhere? Another one of Maurice's grazing illumination (2°) depictions of LRO topo data suggests an explanation. It appears that a gentle rise encompasses the Cauchy linears (outlined on the right). Where gentle doming exists there are additional extensional forces pulling the surface apart. This may account for the location of the rille and fault, with the stresses from Imbrium explaining their orientation. On Earth, rift valleys - trough-like linear depressions between two faults - form on broad domes. I wonder if the Cauchy fault and rille are some perversion of a rift valley? And I bet that the curved ends of both features relate to reaching the edges of the uplift areas, but I am not a structural geologist and don't understand the details. Other localized swelling is associated with rilles - notice the rise at upper right near the Hypatia Rilles.

Chuck Wood

Related Links
Rükl plate 36


Yesterday's LPOD: Caucasian Shadows

Tomorrow's LPOD: No Difference in Rays


COMMENTS?

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