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=Posidonius: Rilles and Uplift= | =Posidonius: Rilles and Uplift= | ||
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| − | + | <td><p class="Story" align="center"><b>Posidonius: Rilles and Uplift</b></p> | |
| − | + | <p class="story" align="left">Posidonius is a beacon of interest along the otherwise bland north-eastern shore of Serenitatis. The large (95 km wide, 2.3 km max depth crater may have originally looked like Copernicus with broad terraced walls and a scattering of peaks centered on a deep, flat floor. But thats not how it looks now! As this excellent photo by Jim Phillips shows the inner walls are narrow ridges (at least on the mare side), the floor is shallow, wide and covered with arcuate mountains, hills and rilles. How did the transformation take place? Like [../../../LPOD-2004-01-07.htm Petavius], Posidonius is a floor-fractured crater. Rising magma ponded under Posidonius, uplifting and fracturing its floor. Lava also leaked out and partially filled the crater and created the sinuous rille. The small semi-circle of peaks near the center may be the tops of a lava-large buried central peak complex. The arcuate mountains near the east and west walls are more mysterious - are they uplifted floor or isolated portions of terraces? Take a look!</p> | |
| − | + | <p class="story" align="left"><span class="class"><i>Originally posted January 9, 2004 </i></span></p> | |
| − | + | <p class="story" align="left"><b>Related Links:</b><br> | |
| − | + | [http://www.apolloexplorer.co.uk/photo/html/as15/10075722.htm Posidonius from Apollo 15] | |
| − | + | </p> | |
| − | + | <p class="story"><b>Tomorrow's LPOD:</b> Gassendi</p> | |
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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>A service of:</b><br> | |
| − | + | [http://www.observingthesky.org/ ObservingTheSky.Org]</p> | |
| − | + | <p align="center" class="main_titles"><b>Visit these other PODs:</b> <br> | |
| − | + | [http://antwrp.gsfc.nasa.gov/apod/astropix.html Astronomy] | [http://www.msss.com/ Mars] | [http://epod.usra.edu/ Earth]</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 17:20, 4 January 2015
Posidonius: Rilles and Uplift
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<IMG SRC="../01/images/LPOD-2004-01-09.jpeg" NAME="Pic1But" width="393" height="399" border="0">
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Posidonius: Rilles and Uplift Posidonius is a beacon of interest along the otherwise bland north-eastern shore of Serenitatis. The large (95 km wide, 2.3 km max depth crater may have originally looked like Copernicus with broad terraced walls and a scattering of peaks centered on a deep, flat floor. But thats not how it looks now! As this excellent photo by Jim Phillips shows the inner walls are narrow ridges (at least on the mare side), the floor is shallow, wide and covered with arcuate mountains, hills and rilles. How did the transformation take place? Like [../../../LPOD-2004-01-07.htm Petavius], Posidonius is a floor-fractured crater. Rising magma ponded under Posidonius, uplifting and fracturing its floor. Lava also leaked out and partially filled the crater and created the sinuous rille. The small semi-circle of peaks near the center may be the tops of a lava-large buried central peak complex. The arcuate mountains near the east and west walls are more mysterious - are they uplifted floor or isolated portions of terraces? Take a look! Originally posted January 9, 2004 Related Links: Tomorrow's LPOD: Gassendi |
Author & Editor:
Charles A. Wood
Technical Consultant:
Anthony Ayiomamitis
A service of:
ObservingTheSky.Org
Visit these other PODs:
Astronomy | Mars | Earth
COMMENTS?
Click on this icon File:PostIcon.jpg at the upper right to post a comment.
