Difference between revisions of "August 16, 2010"
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| − | <em>image by [mailto:slamm@blueyonder.co.uk | + | <em>image by [mailto:slamm@blueyonder.co.uk Stefan Lammel]</em><br /> |
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| − | I've done it again. I've taken one of Stefan's carefully processed [http://www.pbase.com/slammel/image/124815124/original | + | I've done it again. I've taken one of Stefan's carefully processed [http://www.pbase.com/slammel/image/124815124/original images] and enhanced it so much that it reduced the tonal smoothness that he works hard to produce. My excuse is that harsh processing often reveals suble topographic features that are otherwise easy to miss. Here those features are mostly ridges near the crater Lambert. But there are other things here too - the bright rays and crater chains from Copernicus on the right side, and a short rille that is well known from Apollo 15 and 17 Metric [http://wms.lroc.asu.edu/apollo/view?image_id=AS17-M-2286 images.] But the ridges catch my eye. For a terrestrial volcanologist, it looks like the volcano Lambert occurs at the intersection of three radial ridges, no doubt volcanic dikes that transported magma away from the underlying magma chamber. But that would be wrong, for Lambert is an impact crater. North of Lambert there is an arc of mare ridges that probably mark part of one of the Imbrium Basin's inner rings. Notice how in the middle of the arc the ridges become much shorter and lower elevation. We think we know some general ideas of how mare ridges form but the details are much less clear. Finally, are those lava flow fronts west of Lambert? There should be fronts everywhere in the mare, but their low heights - a few tens of meters at most - mean that small scale impact cratering chipped away their edges, making them very difficult to detect.<br /> |
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| − | <em>[mailto:tychocrater@yahoo.com | + | <em>[mailto:tychocrater@yahoo.com Chuck Wood]</em><br /> |
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<strong>Technical Details</strong><br /> | <strong>Technical Details</strong><br /> | ||
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| − | <div>You can support LPOD when you buy any book from Amazon thru [http://www.lpod.org/?page_id=591 | + | <div>You can support LPOD when you buy any book from Amazon thru [http://www.lpod.org/?page_id=591 LPOD!]<br /> |
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===COMMENTS?=== | ===COMMENTS?=== | ||
| − | + | Register, and click on the <b>Discussion</b> tab at the top of the page. | |
Revision as of 17:23, 11 January 2015
Micro Slopes
image by Stefan Lammel
I've done it again. I've taken one of Stefan's carefully processed images and enhanced it so much that it reduced the tonal smoothness that he works hard to produce. My excuse is that harsh processing often reveals suble topographic features that are otherwise easy to miss. Here those features are mostly ridges near the crater Lambert. But there are other things here too - the bright rays and crater chains from Copernicus on the right side, and a short rille that is well known from Apollo 15 and 17 Metric images. But the ridges catch my eye. For a terrestrial volcanologist, it looks like the volcano Lambert occurs at the intersection of three radial ridges, no doubt volcanic dikes that transported magma away from the underlying magma chamber. But that would be wrong, for Lambert is an impact crater. North of Lambert there is an arc of mare ridges that probably mark part of one of the Imbrium Basin's inner rings. Notice how in the middle of the arc the ridges become much shorter and lower elevation. We think we know some general ideas of how mare ridges form but the details are much less clear. Finally, are those lava flow fronts west of Lambert? There should be fronts everywhere in the mare, but their low heights - a few tens of meters at most - mean that small scale impact cratering chipped away their edges, making them very difficult to detect.
Chuck Wood
Technical Details
22-May-10, 22:17UT. 10in f4.8 Newtonian, Infinity 2-1M, Baader red filter, Avistack, Registax, PSE5, Focus Magic.
Related Links
Rükl plate 20
COMMENTS?
Register, and click on the Discussion tab at the top of the page.
