Difference between revisions of "May 14, 2010"
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| − | <em>LRO wide angle camera (WAC) image from [http://lroc.sese.asu.edu/news/index.php?/archives/220-Mare-Frigoris-Constellation-Region-of-Interest.html LRO Featured Images]. Image number M119673851ME [NASA/GSFC/Arizona State University]. (Ignore the white lines - they mark something less interesting than these rilles)</em><br /> | + | <em>LRO wide angle camera (WAC) image from [http://lroc.sese.asu.edu/news/index.php?/archives/220-Mare-Frigoris-Constellation-Region-of-Interest.html" rel="nofollow LRO Featured Images]. Image number M119673851ME [NASA/GSFC/Arizona State University]. (Ignore the white lines - they mark something less interesting than these rilles)</em><br /> |
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| − | The Sheepshanks Rille is hard to observe because it runs approximately E-W and thus casts few shadows. It is just north of the dark lavas of Mare Frigoris in lighter hued plains that have been [http://www.lpi.usra.edu/meetings/lpsc2000/pdf/1822.pdf considered] either impact eject or older mare volcanism, lightened by highlands ejecta. I think these thin, delicate and cratered-upon rilles favor the covered mare lavas interpretation. In [http://www.lpod.org/archive/LPOD-2005-02-13.htm telescopic] and [http://www.lpi.usra.edu/resources/lunar_orbiter/images/img/iv_092_h1.jpg Lunar Orbiter IV] images essentially only the main rille (the topmost one here) is readily visible so this LRO scene reveals rille segments that were at a minimum poorly known. The main rille in the area between the two large craters has one or two interruptions where the surface materials are continuous across the rille. This is most reasonably interpreted as a lava tube whose roof has collapsed everywhere except for these two areas. The narrower and shallower rilles to the south are also not everywhere continuous suggesting they also originated as lava tubes. The lava tube origin, if correct, further buttresses the argument that the light plains here are volcanics. In comparing this image with one from Lunar Orbiter IV it appears that faint rille segments probably connect the Sheepshanks rilles to the [http://the-moon.wikispaces.com/Rima+Gartner Gärtner Rille] to the east. I was going to say that testing this speculation will be possible with further release of LRO WAC images to the east, but I see that 16 year old Clementine [http://www.mapaplanet.org/explorer-bin/explorer.cgi?map=Moon&layers=moon_clementine_multi&west=24.20&south=56.55&east=38.20&north=60.81&center_lat=0&center=31.2&defaultcenter=on&grid=none&stretch=auto&projection=SIMP&r=5&g=3&b=1&advoption=YES&info=NO&resolution=64&scale=0.23690&imageTopX=-106013.2842510939&imageTopY=1811464.9788290262 data] already confirm it! Hmm, what do we do with a rille whose two ends have different names?<br /> | + | The Sheepshanks Rille is hard to observe because it runs approximately E-W and thus casts few shadows. It is just north of the dark lavas of Mare Frigoris in lighter hued plains that have been [http://www.lpi.usra.edu/meetings/lpsc2000/pdf/1822.pdf" rel="nofollow considered] either impact eject or older mare volcanism, lightened by highlands ejecta. I think these thin, delicate and cratered-upon rilles favor the covered mare lavas interpretation. In [http://www.lpod.org/archive/LPOD-2005-02-13.htm" rel="nofollow telescopic] and [http://www.lpi.usra.edu/resources/lunar_orbiter/images/img/iv_092_h1.jpg" rel="nofollow Lunar Orbiter IV] images essentially only the main rille (the topmost one here) is readily visible so this LRO scene reveals rille segments that were at a minimum poorly known. The main rille in the area between the two large craters has one or two interruptions where the surface materials are continuous across the rille. This is most reasonably interpreted as a lava tube whose roof has collapsed everywhere except for these two areas. The narrower and shallower rilles to the south are also not everywhere continuous suggesting they also originated as lava tubes. The lava tube origin, if correct, further buttresses the argument that the light plains here are volcanics. In comparing this image with one from Lunar Orbiter IV it appears that faint rille segments probably connect the Sheepshanks rilles to the [http://the-moon.wikispaces.com/Rima+Gartner Gärtner Rille] to the east. I was going to say that testing this speculation will be possible with further release of LRO WAC images to the east, but I see that 16 year old Clementine [http://www.mapaplanet.org/explorer-bin/explorer.cgi?map=Moon&layers=moon_clementine_multi&west=24.20&south=56.55&east=38.20&north=60.81&center_lat=0&center=31.2&defaultcenter=on&grid=none&stretch=auto&projection=SIMP&r=5&g=3&b=1&advoption=YES&info=NO&resolution=64&scale=0.23690&imageTopX=-106013.2842510939&imageTopY=1811464.9788290262" rel="nofollow data] already confirm it! Hmm, what do we do with a rille whose two ends have different names?<br /> |
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| − | <em>[mailto:tychocrater@yahoo.com Chuck Wood]</em><br /> | + | <em>[mailto:tychocrater@yahoo.com" rel="nofollow Chuck Wood]</em><br /> |
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<strong>Related Links</strong><br /> | <strong>Related Links</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 LPOD!]<br /> | + | <div>You can support LPOD when you buy any book from Amazon thru [http://www.lpod.org/?page_id=591" rel="nofollow LPOD!]<br /> |
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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 19:23, 4 January 2015
More Rilles And Fewer
LRO wide angle camera (WAC) image from " rel="nofollow LRO Featured Images. Image number M119673851ME [NASA/GSFC/Arizona State University]. (Ignore the white lines - they mark something less interesting than these rilles)
The Sheepshanks Rille is hard to observe because it runs approximately E-W and thus casts few shadows. It is just north of the dark lavas of Mare Frigoris in lighter hued plains that have been " rel="nofollow considered either impact eject or older mare volcanism, lightened by highlands ejecta. I think these thin, delicate and cratered-upon rilles favor the covered mare lavas interpretation. In " rel="nofollow telescopic and " rel="nofollow Lunar Orbiter IV images essentially only the main rille (the topmost one here) is readily visible so this LRO scene reveals rille segments that were at a minimum poorly known. The main rille in the area between the two large craters has one or two interruptions where the surface materials are continuous across the rille. This is most reasonably interpreted as a lava tube whose roof has collapsed everywhere except for these two areas. The narrower and shallower rilles to the south are also not everywhere continuous suggesting they also originated as lava tubes. The lava tube origin, if correct, further buttresses the argument that the light plains here are volcanics. In comparing this image with one from Lunar Orbiter IV it appears that faint rille segments probably connect the Sheepshanks rilles to the Gärtner Rille to the east. I was going to say that testing this speculation will be possible with further release of LRO WAC images to the east, but I see that 16 year old Clementine " rel="nofollow data already confirm it! Hmm, what do we do with a rille whose two ends have different names?
" rel="nofollow Chuck Wood
Related Links
Rükl plate 5
The GLR group published a paper on this rille but I do not have a copy to see what they discovered: Raffaello Lena , KC Pau and Piergiovanni Salimbeni. 2004. Observations of the Rima Sheepshanks. Selenology 23, 1.
COMMENTS?
Click on this icon File:PostIcon.jpg at the upper right to post a comment.
