Difference between revisions of "July 5, 2013"
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=A Tongue & a Bench= | =A Tongue & a Bench= | ||
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| − | <em>image by [mailto:gari@adbooth.net Gari Arrillaga], Cambrils, Spain, and map from [http://www.lpi.usra.edu/meetings/lpsc2010/pdf/1510.pdf Taylor, Martel and Spudis (2010)]</em><br /> | + | <em>image by [mailto:gari@adbooth.net" rel="nofollow Gari Arrillaga], Cambrils, Spain, and map from [http://www.lpi.usra.edu/meetings/lpsc2010/pdf/1510.pdf" rel="nofollow Taylor, Martel and Spudis (2010)]</em><br /> |
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Yesterday's LPOD proposed that the Archimedes Mountains (AM) and nearby lower terrain were emplaced by giant landslides off the Apennine<br /> | Yesterday's LPOD proposed that the Archimedes Mountains (AM) and nearby lower terrain were emplaced by giant landslides off the Apennine<br /> | ||
| − | Mountains. Longtime LPOD participant Howard <span style="background-color: #ffffff; font-family: 'Helvetica Neue',Helvetica,Arial,sans-serif; font-size: 14px;">Eskildsen</span> [http://lpod.wikispaces.com/share/view/63039786 questioned] how that could happen. It would be a long landslide displacement - over<br /> | + | Mountains. Longtime LPOD participant Howard <span style="background-color: #ffffff; font-family: 'Helvetica Neue',Helvetica,Arial,sans-serif; font-size: 14px;">Eskildsen</span> [http://lpod.wikispaces.com/share/view/63039786" rel="nofollow questioned] how that could happen. It would be a long landslide displacement - over<br /> |
200 km horizontally - from a mountain range only 5 km high. Furthermore, with so much material transferred away from the Apennines wouldn't<br /> | 200 km horizontally - from a mountain range only 5 km high. Furthermore, with so much material transferred away from the Apennines wouldn't<br /> | ||
there be a large indent in the Apennines where the AM were removed? I am delighted by this question because it is geologically reasonable<br /> | there be a large indent in the Apennines where the AM were removed? I am delighted by this question because it is geologically reasonable<br /> | ||
and is based on observations. By chance Gari send an image that gives us a wider perspective on this area and problem. And a map from a<br /> | and is based on observations. By chance Gari send an image that gives us a wider perspective on this area and problem. And a map from a<br /> | ||
| − | [http://www.lpi.usra.edu/meetings/lpsc2010/pdf/1510.pdf paper] from a few years ago provides more understanding. The non-mare region around Archimedes crater has been mapped as two different<br /> | + | [http://www.lpi.usra.edu/meetings/lpsc2010/pdf/1510.pdf" rel="nofollow paper] from a few years ago provides more understanding. The non-mare region around Archimedes crater has been mapped as two different<br /> |
kinds of terrains by lunar scientists. The AM are part of the white material in the map that is generally understood as mountainous material, at<br /> | kinds of terrains by lunar scientists. The AM are part of the white material in the map that is generally understood as mountainous material, at<br /> | ||
least some of which slumped off the Apennines; this image shows near bottom center masses of rocks lower than the Apennines but quite<br /> | least some of which slumped off the Apennines; this image shows near bottom center masses of rocks lower than the Apennines but quite<br /> | ||
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hence not dark like the later mare lavas.<br /> | hence not dark like the later mare lavas.<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>Technical Details</strong><br /> | <strong>Technical Details</strong><br /> | ||
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<strong>Related Links</strong><br /> | <strong>Related Links</strong><br /> | ||
<em>[https://lpod.wikispaces.com/21st+Century+Atlas+of+the+Moon 21st Century Atlas]</em> charts 18 & B6.<br /> | <em>[https://lpod.wikispaces.com/21st+Century+Atlas+of+the+Moon 21st Century Atlas]</em> charts 18 & B6.<br /> | ||
| − | Gari's [http://masalladelasnubes.com/ website]<br /> | + | Gari's [http://masalladelasnubes.com/" rel="nofollow website]<br /> |
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Revision as of 21:47, 4 January 2015
A Tongue & a Bench
image by " rel="nofollow Gari Arrillaga, Cambrils, Spain, and map from " rel="nofollow Taylor, Martel and Spudis (2010)
Yesterday's LPOD proposed that the Archimedes Mountains (AM) and nearby lower terrain were emplaced by giant landslides off the Apennine
Mountains. Longtime LPOD participant Howard Eskildsen " rel="nofollow questioned how that could happen. It would be a long landslide displacement - over
200 km horizontally - from a mountain range only 5 km high. Furthermore, with so much material transferred away from the Apennines wouldn't
there be a large indent in the Apennines where the AM were removed? I am delighted by this question because it is geologically reasonable
and is based on observations. By chance Gari send an image that gives us a wider perspective on this area and problem. And a map from a
" rel="nofollow paper from a few years ago provides more understanding. The non-mare region around Archimedes crater has been mapped as two different
kinds of terrains by lunar scientists. The AM are part of the white material in the map that is generally understood as mountainous material, at
least some of which slumped off the Apennines; this image shows near bottom center masses of rocks lower than the Apennines but quite
likely stuff that previously was part of them. The Apennine front is in fact sightly indented here. The two curved arcs of the Archimedes
Mountains themselves have also been considered by some as part of an inner Imbrium Basin ring, and therefore material uplifted from depth at
that location. Geologist are most interested in the second material, the one shown in blue. This Apennine Bench Formation is most commonly
interpreted as a type of unique volcanism that occurred on the floor of the Imbrium Basin before the mare lavas erupted. So there are likely a
range of origins for the material here. Some mountains close to the Apennines are quite likely to be slump blocks, the AM might be too, or
perhaps isolated pieces of an inner basin ring. And the smoother stuff surrounding the hills and mountain is iron and titanium-poor lavas, and
hence not dark like the later mare lavas.
" rel="nofollow Chuck Wood
Technical Details
29-06-2013, 02:44 UT. C11 - ZWOptical ASI 120 MM.
Related Links
21st Century Atlas charts 18 & B6.
Gari's " rel="nofollow website
