Difference between revisions of "February 11, 2013"
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Forty years ago lunar red spots were discovered. These are small volcanic features, like the Gruithuisen domes, | Forty years ago lunar red spots were discovered. These are small volcanic features, like the Gruithuisen domes, | ||
that absorb in the ultraviolet and hence look bright at the red end of the spectrum. [http://articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_query?1975LPICo.234..189W&data_type=PDF_HIGH&whole_paper=YES&type=PRINTER&filetype=.pdf Some] are cones, a few are | that absorb in the ultraviolet and hence look bright at the red end of the spectrum. [http://articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_query?1975LPICo.234..189W&data_type=PDF_HIGH&whole_paper=YES&type=PRINTER&filetype=.pdf Some] are cones, a few are | ||
| − | steep domes and others are just [http://lpod. | + | steep domes and others are just [http://www2.lpod.org/wiki/October_25,_2009 odd pieces] of old terrain. Their steep sides and conical shapes have been suggested as evidence that they were made of materials more viscous than normal mare lavas. Scientists working |
| − | with LRO data have brought to light new information about the [http://lpod. | + | with LRO data have brought to light new information about the [http://www2.lpod.org/wiki/January_31,_2010 Lassell Massif], a red spot just east of 9 km wide |
Lassell C. It is a hilly ridge of older material surrounded by younger lavas of Mare Nubium. The LRO mosaic | Lassell C. It is a hilly ridge of older material surrounded by younger lavas of Mare Nubium. The LRO mosaic | ||
depicts the area, the chart labeled "a" shows the topography of half of Lassell C and the Massif, and "b" presents | depicts the area, the chart labeled "a" shows the topography of half of Lassell C and the Massif, and "b" presents | ||
| Line 22: | Line 22: | ||
<strong>Related Links</strong><br /> | <strong>Related Links</strong><br /> | ||
Rükl plate [https://the-moon.us/wiki/R%C3%BCkl_54 54]<br /> | Rükl plate [https://the-moon.us/wiki/R%C3%BCkl_54 54]<br /> | ||
| − | <em>[ | + | <em>[[21st Century Atlas of the Moon|21st Century Atlas]]</em> chart 16.<br /> |
<br /> | <br /> | ||
<p><b>Yesterday's LPOD:</b> [[February 10, 2013|Hidden Roughness]] </p> | <p><b>Yesterday's LPOD:</b> [[February 10, 2013|Hidden Roughness]] </p> | ||
Latest revision as of 08:26, 28 October 2018
More Evidence
images from Ashley et al, 2013, LPSC #2504.
Forty years ago lunar red spots were discovered. These are small volcanic features, like the Gruithuisen domes,
that absorb in the ultraviolet and hence look bright at the red end of the spectrum. Some are cones, a few are
steep domes and others are just odd pieces of old terrain. Their steep sides and conical shapes have been suggested as evidence that they were made of materials more viscous than normal mare lavas. Scientists working
with LRO data have brought to light new information about the Lassell Massif, a red spot just east of 9 km wide
Lassell C. It is a hilly ridge of older material surrounded by younger lavas of Mare Nubium. The LRO mosaic
depicts the area, the chart labeled "a" shows the topography of half of Lassell C and the Massif, and "b" presents
an interpretive geologic map. Lassell G & K are suggested to perhaps be volcanic pits or explosion craters. The
image at the far right was constructed from LRO's Diviner infra-red data with the purple-blue representing material
that is silica-rich. This is strong support for the idea that this red spot does represent eruptions of magmas more
evolved than mare lavas.
Chuck Wood
Related Links
Rükl plate 54
21st Century Atlas chart 16.
Yesterday's LPOD: Hidden Roughness
Tomorrow's LPOD: Four Worlds
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