Difference between revisions of "February 27, 2004"

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=Structures of the Lunar Surface=
 
=Structures of the Lunar Surface=
 
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      <td width="50%"><h2 align="left">Structures of the Lunar Surface</h2></td>
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  <td width="50%"><h2 align="right">February 27, 2004</h2></td>
 
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      <td colspan="2"><div align="center">
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<td colspan="2"><div align="center">
<IMG SRC="images/LPOD-2004-02-27.jpeg" NAME="main_image" width="403" height="407" border="0"></div>
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[[File:LPOD-2004-02-27.jpeg|LPOD-2004-02-27.jpeg]]</div>
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      <td><div align="center" span class="main_sm">Image Credit:  <a class="one" href="LPOD-2004-02-03.htm"><i>Geologic History of the Moon</i></a></div></td>
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<td><div align="center" span class="main_sm">Image Credit:  [LPOD-2004-02-03.htm <i>Geologic History of the Moon</i>]</div></td>
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<table class="story" border="0" bgcolor="#FFFFFF" width="90%" cellpadding="10" align="center"><tr><td>
 
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<p class="story" align="center"><b>Structures of the Lunar Surface </b></p>
  <p class="story" align="center"><b>Structures of the Lunar Surface </b></p>
+
<p class="story" align="left">
 
+
Structural geology is the study of the landforms caused by horizontal or vertical movement of the crust. On  
  <p class="story" align="left">
+
Earth, much of structural geology concerns faults and folds created by the forces of plate tectonics. On the Moon,
          Structural geology is the study of the landforms caused by horizontal or vertical movement of the crust. On  
+
most structural or tectonic features appear to be associated with impact basins. The image above is  
        Earth, much of structural geology concerns faults and folds created by the forces of plate tectonics. On the Moon,
+
[LPOD-2004-02-23.htm another] from the lunar bible: Don Wilhelms'  
        most structural or tectonic features appear to be associated with impact basins. The image above is  
+
[LPOD-2004-02-03.htm <I>Geologic History of the Moon</I>]. Overlaying a faint image of the Moon are
        [LPOD-2004-02-23.htm another] from the lunar bible: Don Wilhelms'  
+
a series of lines, circles and dots. Here is what they mean. The blue circles are the main rims of impact basins  
        [LPOD-2004-02-03.htm <I>Geologic History of the Moon</I>]. Overlaying a faint image of the Moon are
+
- the circle is dashed where there is uncertainty of its exact position or even existence. The largest circle is  
        a series of lines, circles and dots. Here is what they mean. The blue circles are the main rims of impact basins  
+
for the Procellarum or Gargantuan Basin - it really should be dashed! The red, slightly wiggly lines are wrinkle  
        - the circle is dashed where there is uncertainty of its exact position or even existence. The largest circle is  
+
(or mare) ridges. In some basins (e.g. Crisium, Serenetatis, Imbrium) they define basin inner rings. In other  
        for the Procellarum or Gargantuan Basin - it really should be dashed! The red, slightly wiggly lines are wrinkle  
+
cases (Fecunditatis and [LPOD-2004-02-07.htm Nubium]) it is unclear what they signify. Black lines  
        (or mare) ridges. In some basins (e.g. Crisium, Serenetatis, Imbrium) they define basin inner rings. In other  
+
are faults - linear fractures thru the crust - and many are flat-floored rilles such as the Ariadaeus. Others are  
        cases (Fecunditatis and [LPOD-2004-02-07.htm Nubium]) it is unclear what they signify. Black lines  
+
faults with vertical movements such as the Straight Wall and the [../01/LPOD-2004-01-02.htm Cauchy fault].
        are faults - linear fractures thru the crust - and many are flat-floored rilles such as the Ariadaeus. Others are  
+
And others are radial linear features such as the Alpine Valley and concentric rilles  
        faults with vertical movements such as the Straight Wall and the [../01/LPOD-2004-01-02.htm Cauchy fault].
+
([./LPOD-2004-02-18.htm Humorum] and [../01/LPOD-2004-01-12.htm Tranquillitatis]). Black  
        And others are radial linear features such as the Alpine Valley and concentric rilles  
+
circles are floor-fractured craters such as [../01/LPOD-2004-01-09.htm Posidonius] and  
        ([./LPOD-2004-02-18.htm Humorum] and [../01/LPOD-2004-01-12.htm Tranquillitatis]). Black  
+
[../01/LPOD-2004-01-15.htm Gassendi]. Note how all of these features cluster near maria - and as you  
        circles are floor-fractured craters such as [../01/LPOD-2004-01-09.htm Posidonius] and  
+
should expect, there are almost no tectonics features on the mare-poor farside.  
        [../01/LPOD-2004-01-15.htm Gassendi]. Note how all of these features cluster near maria - and as you  
+
</p>
        should expect, there are almost no tectonics features on the mare-poor farside.  
+
<p class="story"> <b>Tomorrow's LPOD:</b> Angular Basin</p>
</p>
+
</td></tr>
 
 
  <p class"story"> <b>Tomorrow's LPOD:</b> Angular Basin</p>
 
 
 
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</td></tr>
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<p align="center" class="main_titles"><b>Author & Editor:</b><br>
  <table width="100%"  border="0" cellspacing="2" cellpadding="4">
+
[mailto:tychocrater@yahoo.com Charles A. Wood]</p>
    <tr>
+
<p align="center" class="main_titles"><b>Technical Consultant:</b><br>
      <td><hr width="640"></td>
+
[mailto:anthony@perseus.gr Anthony Ayiomamitis]</p>
      </tr>
+
<p align="center" class="main_titles"><b>A service of:</b><br>
    <tr>
+
[http://www.observingthesky.org/ ObservingTheSky.Org]</p>
      <td>
+
<p align="center" class="main_titles"><b>Visit these other PODs:</b> <br>
  <p align="center" class="main_titles"><b>Author & Editor:</b><br>
+
[http://antwrp.gsfc.nasa.gov/apod/astropix.html Astronomy] | [http://www.msss.com/ Mars] | [http://epod.usra.edu/ Earth]</p></td>
      [mailto:chuck@observingthesky.org Charles A. Wood]</p>
+
</tr>
      <p align="center" class="main_titles"><b>Technical Consultant:</b><br>
 
      [mailto:anthony@perseus.gr Anthony Ayiomamitis]</p>
 
      <p align="center" class="main_titles"><b>[mailto:webmaster@entropysponge.com Contact Webmaster]</b></p>
 
      <p align="center" class="main_titles"><b>A service of:</b><br>
 
      <a class="one" href="http://www.observingthesky.org/">ObservingTheSky.Org</a></p>
 
      <p align="center" class="main_titles"><b>Visit these other PODs:</b> <br>
 
      <a class="one" href="http://antwrp.gsfc.nasa.gov/apod/astropix.html">Astronomy</a> | <a class="one" href="http://www.msss.com/">Mars</a> | <a class="one" href="http://epod.usra.edu/">Earth</a></p></td>
 
      </tr>
 
 
</table>
 
</table>
 
 
 
 
<p>&nbsp;</p>
 
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===COMMENTS?===  
 
===COMMENTS?===  
 
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Revision as of 18:16, 4 January 2015

Structures of the Lunar Surface

LPOD-2004-02-27.jpeg
Image Credit: [LPOD-2004-02-03.htm Geologic History of the Moon]

Structures of the Lunar Surface

Structural geology is the study of the landforms caused by horizontal or vertical movement of the crust. On Earth, much of structural geology concerns faults and folds created by the forces of plate tectonics. On the Moon, most structural or tectonic features appear to be associated with impact basins. The image above is [LPOD-2004-02-23.htm another] from the lunar bible: Don Wilhelms' [LPOD-2004-02-03.htm Geologic History of the Moon]. Overlaying a faint image of the Moon are a series of lines, circles and dots. Here is what they mean. The blue circles are the main rims of impact basins - the circle is dashed where there is uncertainty of its exact position or even existence. The largest circle is for the Procellarum or Gargantuan Basin - it really should be dashed! The red, slightly wiggly lines are wrinkle (or mare) ridges. In some basins (e.g. Crisium, Serenetatis, Imbrium) they define basin inner rings. In other cases (Fecunditatis and [LPOD-2004-02-07.htm Nubium]) it is unclear what they signify. Black lines are faults - linear fractures thru the crust - and many are flat-floored rilles such as the Ariadaeus. Others are faults with vertical movements such as the Straight Wall and the [../01/LPOD-2004-01-02.htm Cauchy fault]. And others are radial linear features such as the Alpine Valley and concentric rilles ([./LPOD-2004-02-18.htm Humorum] and [../01/LPOD-2004-01-12.htm Tranquillitatis]). Black circles are floor-fractured craters such as [../01/LPOD-2004-01-09.htm Posidonius] and [../01/LPOD-2004-01-15.htm Gassendi]. Note how all of these features cluster near maria - and as you should expect, there are almost no tectonics features on the mare-poor farside.

Tomorrow's LPOD: Angular Basin


Author & Editor:
Charles A. Wood

Technical Consultant:
Anthony Ayiomamitis

A service of:
ObservingTheSky.Org

Visit these other PODs:
Astronomy | Mars | Earth

 


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Click on this icon File:PostIcon.jpg at the upper right to post a comment.