Difference between revisions of "December 29, 2010"
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=Wonderfully Modified Craters= | =Wonderfully Modified Craters= | ||
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| − | <em>image by [http://www.lpi.usra.edu/meetings/lpsc2010/pdf/1335.pdf J. Korteniemi et al (2010)]</em><br /> | + | <em>image by [http://www.lpi.usra.edu/meetings/lpsc2010/pdf/1335.pdf" rel="nofollow J. Korteniemi et al (2010)]</em><br /> |
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[http://the-moon.wikispaces.com/Floor+Fractured+Craters Floor-fractured craters] are the most interesting on the Moon. <br /> | [http://the-moon.wikispaces.com/Floor+Fractured+Craters Floor-fractured craters] are the most interesting on the Moon. <br /> | ||
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mostly ended about 3 to 2.5 b.y. ago. Nearly all FFC are on the margins of maria and the preferred model is that magma rose <br /> | mostly ended about 3 to 2.5 b.y. ago. Nearly all FFC are on the margins of maria and the preferred model is that magma rose <br /> | ||
up basin fractures and ponded under the craters, ultimately lifting their floors, and often erupting lavas onto their floors. In <br /> | up basin fractures and ponded under the craters, ultimately lifting their floors, and often erupting lavas onto their floors. In <br /> | ||
| − | 1976 [http://adsabs.harvard.edu/abs/1976Moon...15..241S Pete Schultz] first brought attention to FFC as a class of modified impact craters and he identified 206 but never <br /> | + | 1976 [http://adsabs.harvard.edu/abs/1976Moon...15..241S" rel="nofollow Pete Schultz] first brought attention to FFC as a class of modified impact craters and he identified 206 but never <br /> |
published a comprehensive list of them. This new map, made by summer students interning at the Lunar & Planetary Institute <br /> | published a comprehensive list of them. This new map, made by summer students interning at the Lunar & Planetary Institute <br /> | ||
in Houston, is based on inspection of Clementine and Apollo images, resulting in the discovery of 110 more FFC and 85 <br /> | in Houston, is based on inspection of Clementine and Apollo images, resulting in the discovery of 110 more FFC and 85 <br /> | ||
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needed for a careful re-examination of FFC and perhaps new understanding of their origins.<br /> | needed for a careful re-examination of FFC and perhaps new understanding of their origins.<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 /> |
<br /> | <br /> | ||
<strong>Related Links</strong><br /> | <strong>Related Links</strong><br /> | ||
| − | J. Korteniemi, D. L. Eldridge, T. Lough, L. Werblin, K. I. Singer and D. A. Kring (2010) ASSESSMENT OF LUNAR VOLCANIC MORPHOLOGICAL DIVERSITY: DISTRIBUTION OF FLOOR-FRACTURED CRATERS. 41st Lunar and Planetary Science Conference, abstract [http://www.lpi.usra.edu/meetings/lpsc2010/pdf/1335.pdf 1335]. <br /> | + | J. Korteniemi, D. L. Eldridge, T. Lough, L. Werblin, K. I. Singer and D. A. Kring (2010) ASSESSMENT OF LUNAR VOLCANIC MORPHOLOGICAL DIVERSITY: DISTRIBUTION OF FLOOR-FRACTURED CRATERS. 41st Lunar and Planetary Science Conference, abstract [http://www.lpi.usra.edu/meetings/lpsc2010/pdf/1335.pdf" rel="nofollow 1335]. <br /> |
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Revision as of 22:11, 4 January 2015
Wonderfully Modified Craters
image by " rel="nofollow J. Korteniemi et al (2010)
Floor-fractured craters are the most interesting on the Moon.
Well, you might say, what about Copernicus and Tycho - their floors aren't fractured and they are pretty interesting. True,
but I wonder if they have as many different types of things to see as FFC? Consider FFC such as Alphonsus, Posidonius,
Gassendi and Petavius. First, they are relatively large craters with uplifted floors and related concentric fractures. Second,
these and other FFC often contain various kinds of rilles, concentric craters and dark halo craters. Few FFC are young
enough to have rays (exception is Taruntius) because they already existed when mare basalts were being produced, which
mostly ended about 3 to 2.5 b.y. ago. Nearly all FFC are on the margins of maria and the preferred model is that magma rose
up basin fractures and ponded under the craters, ultimately lifting their floors, and often erupting lavas onto their floors. In
1976 " rel="nofollow Pete Schultz first brought attention to FFC as a class of modified impact craters and he identified 206 but never
published a comprehensive list of them. This new map, made by summer students interning at the Lunar & Planetary Institute
in Houston, is based on inspection of Clementine and Apollo images, resulting in the discovery of 110 more FFC and 85
possible ones. Sadly, they have not published a list either, but I will try to get it from LPI so that the information can be added
to the Moon-Wiki. With the LRO WAC mosaics that are becoming available it will be possible to confirm these (I doubt that
Theophilus is a FFC) and probably find new ones. This much larger sample size will provide some PhD student the data
needed for a careful re-examination of FFC and perhaps new understanding of their origins.
" rel="nofollow Chuck Wood
Related Links
J. Korteniemi, D. L. Eldridge, T. Lough, L. Werblin, K. I. Singer and D. A. Kring (2010) ASSESSMENT OF LUNAR VOLCANIC MORPHOLOGICAL DIVERSITY: DISTRIBUTION OF FLOOR-FRACTURED CRATERS. 41st Lunar and Planetary Science Conference, abstract " rel="nofollow 1335.
