Difference between revisions of "February 14, 2005"
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| − | + | <td width="50%"><h2><nobr>Mare Swells </nobr></h2></td> | |
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| − | + | <tr><td><div align="center" class="main_sm">Image Credit: [mailto:thefamily90@hotmail.com Jim Phillips]</p> | |
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<table class="story" border="0" bgcolor="#FFFFFF" width="90%" cellpadding="10" align="center"><tr><td> | <table class="story" border="0" bgcolor="#FFFFFF" width="90%" cellpadding="10" align="center"><tr><td> | ||
| − | + | <p align="center"><b>Mare Swells </b></p> | |
| − | + | <p align="left">The continuing search for domes by members of the [http://www.glrgroup.org/ Geological Lunar Research group ] has resulted in acquisition of many excellent low Sun views of the maria, such as this one by Jim Phillips. Although a few classical domes hemispherically shaped and often with a summit pit have been discovered on such photos, the majority of the newly found features are less regular in outline, relatively flat and often adjacent to or engulfing steeper topography. The well known feature near Gambart C and D (1 on mouseover) is a prime example of this class of subtle topographic structure. I prefer to not call this type of mare protuberance a dome because it may have a completely different origin from classic domes; instead I call it a swell. We dont yet understand how swells form. They are clearly made of mare material, but it is not clear if they formed by eruption of lava onto the lunar surface like domes or if they are some sort of inflation or lifting up of a pre-existing mare surface. Because swells lack the morphologic features of domes, and tend not to be associated with other eruptive landforms, I favor the second idea. But this 10-15 km long swell near Gambart C is bigger than any terrestrial lava inflation mound that I know of on Earth, and the 70 km wide Valentine Dome is even bigger. A smaller swell (2) occurs just south of the big one, and an interesting area of small hills of indeterminate origin is nearby. We need high quality, low Sun images such as this for every mare area of the Moon to really understand maria.</p> | |
| − | + | <blockquote><p align="right">— [mailto:tychocrater@yahoo.com Chuck Wood]</blockquote> | |
<p align="left"><p><b>Technical Details:</b><br> | <p align="left"><p><b>Technical Details:</b><br> | ||
Jan 18, 2005. 8 f/9 TMB.</p> | Jan 18, 2005. 8 f/9 TMB.</p> | ||
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<br>Rukl Sheet 32 | <br>Rukl Sheet 32 | ||
<p align="left"><b>Tomorrow's LPOD: </b> Astro-Heart</p> | <p align="left"><b>Tomorrow's LPOD: </b> Astro-Heart</p> | ||
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| − | + | <td><hr></td> | |
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| − | + | <p align="center" class="main_titles"><b>Author & Editor:</b><br> | |
| − | + | [mailto:tychocrater@yahoo.com Charles A. Wood]</p> | |
| − | + | <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>Contact Translator:</b><br> | |
| − | + | [mailto:pablolonnie@yahoo.com.mx" class="one Pablo Lonnie Pacheco Railey] (Es)<br> | |
| − | + | [mailto:chlegrand@free.fr" class="one Christian Legrand] (Fr)</p> | |
| − | + | <p align="center" class="main_titles"><b>[mailto:webuser@observingthesky.org Contact Webmaster]</b></p> | |
| − | + | <p align="center" class="main_titles"><b>A service of:</b><br> | |
| − | + | [http://www.observingthesky.org/" class="one ObservingTheSky.Org]</p> | |
| − | + | <p align="center" class="main_titles"><b>Visit these other PODs:</b> <br> | |
| − | + | [http://antwrp.gsfc.nasa.gov/apod/astropix.html" class="one Astronomy] | [http://www.msss.com/" class="one Mars] | [http://epod.usra.edu/" class="one Earth]</p> | |
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</table> | </table> | ||
<p> </p> | <p> </p> | ||
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===COMMENTS?=== | ===COMMENTS?=== | ||
Click on this icon [[image:PostIcon.jpg]] at the upper right to post a comment. | Click on this icon [[image:PostIcon.jpg]] at the upper right to post a comment. | ||
Revision as of 18:29, 4 January 2015
Mare Swells
<nobr>Mare Swells </nobr> |
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Image Credit: Jim Phillips
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Mare Swells The continuing search for domes by members of the Geological Lunar Research group has resulted in acquisition of many excellent low Sun views of the maria, such as this one by Jim Phillips. Although a few classical domes hemispherically shaped and often with a summit pit have been discovered on such photos, the majority of the newly found features are less regular in outline, relatively flat and often adjacent to or engulfing steeper topography. The well known feature near Gambart C and D (1 on mouseover) is a prime example of this class of subtle topographic structure. I prefer to not call this type of mare protuberance a dome because it may have a completely different origin from classic domes; instead I call it a swell. We dont yet understand how swells form. They are clearly made of mare material, but it is not clear if they formed by eruption of lava onto the lunar surface like domes or if they are some sort of inflation or lifting up of a pre-existing mare surface. Because swells lack the morphologic features of domes, and tend not to be associated with other eruptive landforms, I favor the second idea. But this 10-15 km long swell near Gambart C is bigger than any terrestrial lava inflation mound that I know of on Earth, and the 70 km wide Valentine Dome is even bigger. A smaller swell (2) occurs just south of the big one, and an interesting area of small hills of indeterminate origin is nearby. We need high quality, low Sun images such as this for every mare area of the Moon to really understand maria. Technical Details: Related Links: Tomorrow's LPOD: Astro-Heart |
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Author & Editor: Technical Consultant: Contact Translator: A service of: Visit these other PODs: |
COMMENTS?
Click on this icon File:PostIcon.jpg at the upper right to post a comment.
