Difference between revisions of "November 14, 2010"
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=Younger And Older?= | =Younger And Older?= | ||
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<em>north to left LRO WAC image processed by [mailto:slamm@blueyonder.co.uk Stefan Lammel], UK</em><br /> | <em>north to left LRO WAC image processed by [mailto:slamm@blueyonder.co.uk Stefan Lammel], UK</em><br /> | ||
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| − | This low Sun view of Rümker provokes new observations and resurrection of some old questions. | + | This low Sun view of Rümker provokes new observations and resurrection of some old questions. |
| − | First thought to be a degraded crater, Rümker finally became recognized as a pile of volcanic domes. | + | First thought to be a degraded crater, Rümker finally became recognized as a pile of volcanic domes. |
| − | The most recent [http://www.lpi.usra.edu/meetings/lpsc2007/pdf/1091.pdf study] by Christian Wöhler, Raf Lena and K. C. Pau determined that Rümker rises | + | The most recent [http://www.lpi.usra.edu/meetings/lpsc2007/pdf/1091.pdf study] by Christian Wöhler, Raf Lena and K. C. Pau determined that Rümker rises |
| − | about 1 km above the Procellarum lavas, with six individual domes about 100 to 200 meters tall. The | + | about 1 km above the Procellarum lavas, with six individual domes about 100 to 200 meters tall. The |
| − | low spot in the center helps explain why older observers mistook Rümker for a degraded crater. Another | + | low spot in the center helps explain why older observers mistook Rümker for a degraded crater. Another |
| − | process that forms a depression in the center of a volcanic structure is collapse to form a caldera. | + | process that forms a depression in the center of a volcanic structure is collapse to form a caldera. |
| − | That is possible, but perhaps the low spot is simply a place where domes didn't form. Along the top part | + | That is possible, but perhaps the low spot is simply a place where domes didn't form. Along the top part |
| − | of Rümker the surrounding mare lavas ride up against and perhaps a little over the dome complex. At | + | of Rümker the surrounding mare lavas ride up against and perhaps a little over the dome complex. At |
| − | the north (left in this view) end of Rümker it appears that the dome truncates the mare ridge, suggesting | + | the north (left in this view) end of Rümker it appears that the dome truncates the mare ridge, suggesting |
| − | that Rümker is younger than this piece of the mare. Both Rümker and the maria that encircle it have | + | that Rümker is younger than this piece of the mare. Both Rümker and the maria that encircle it have |
| − | various ages.<br /> | + | various ages. |
| + | <br /> | ||
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<em>[mailto:tychocrater@yahoo.com Chuck Wood]</em><br /> | <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 [ | + | Rükl plate [https://the-moon.us/wiki/R%C3%BCkl_8 8]<br /> |
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| − | + | <p><b>Yesterday's LPOD:</b> [[November 13, 2010|My Moon]] </p> | |
| + | <p><b>Tomorrow's LPOD:</b> [[November 15, 2010|Crystal Clear but Still Unclear]] </p> | ||
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Latest revision as of 18:54, 13 October 2018
Younger And Older?
north to left LRO WAC image processed by Stefan Lammel, UK
This low Sun view of Rümker provokes new observations and resurrection of some old questions.
First thought to be a degraded crater, Rümker finally became recognized as a pile of volcanic domes.
The most recent study by Christian Wöhler, Raf Lena and K. C. Pau determined that Rümker rises
about 1 km above the Procellarum lavas, with six individual domes about 100 to 200 meters tall. The
low spot in the center helps explain why older observers mistook Rümker for a degraded crater. Another
process that forms a depression in the center of a volcanic structure is collapse to form a caldera.
That is possible, but perhaps the low spot is simply a place where domes didn't form. Along the top part
of Rümker the surrounding mare lavas ride up against and perhaps a little over the dome complex. At
the north (left in this view) end of Rümker it appears that the dome truncates the mare ridge, suggesting
that Rümker is younger than this piece of the mare. Both Rümker and the maria that encircle it have
various ages.
Chuck Wood
Technical Details
LRO WAC image M116696225ME
Related Links
Rükl plate 8
Yesterday's LPOD: My Moon
Tomorrow's LPOD: Crystal Clear but Still Unclear
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