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Wils' Tetrahedron
- tvanflandern
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18 years 3 months ago #9049
by tvanflandern
Reply from Tom Van Flandern was created by tvanflandern
<blockquote id="quote"><font size="2" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by Zip Monster</i>
<br />Wils' Tetrahedron<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">That's a nice one. However, take note of the direction of the Sun (to the right in the orientation you showed). This means the feature is a pit, not raised above the surface. So there is no "fourth face". -|Tom|-
<br />Wils' Tetrahedron<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">That's a nice one. However, take note of the direction of the Sun (to the right in the orientation you showed). This means the feature is a pit, not raised above the surface. So there is no "fourth face". -|Tom|-
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- Zip Monster
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18 years 3 months ago #16314
by Zip Monster
Replied by Zip Monster on topic Reply from George
Tom, sorry for the confusion, the link is to the USGS site, the image posted above is a crop from the inverted strip featured on Malin's site.
It's not a pit.
Zip Monster
It's not a pit.
Zip Monster
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18 years 3 months ago #9050
by tvanflandern
Replied by tvanflandern on topic Reply from Tom Van Flandern
<blockquote id="quote"><font size="2" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by Zip Monster</i>
<br />Tom, sorry for the confusion, the link is to the USGS site, the image posted above is a crop from the inverted strip featured on Malin's site. It's not a pit.<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">Thx. I agree. I did one too many inversions when drawing the original into Photoshop. -|Tom|-
<br />Tom, sorry for the confusion, the link is to the USGS site, the image posted above is a crop from the inverted strip featured on Malin's site. It's not a pit.<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">Thx. I agree. I did one too many inversions when drawing the original into Photoshop. -|Tom|-
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18 years 3 months ago #16195
by neilderosa
Replied by neilderosa on topic Reply from Neil DeRosa
Wil Faust's mound is a good find. By comparing to the adjoining map-projected context image, E0600270, my double check shows the "not map-projected" narrow angle gif for E0600269 to be oriented correctly for NSEW in the MSSS gallery.
www.msss.com/moc_gallery/e01_e06/images/E06/E0600269.html
Measured with a ruler, I get around 300 meters across, so that checks out with ZM's numbers. Local time is 14.70, so the shadows are right for a mound also, and not a ditch.
This three sided mound has sharp, straight edges and apparenly flat sides, so it definately looks artifiical, much more so than the D&M. My only caution would be that resolution of the image is only fair at 5.73 m/p, so I would make any conclusions contingient on better imaging. But it looks promising. Here's Wil's mound enhanced a little more with a histogram adjustment.
Neil
www.msss.com/moc_gallery/e01_e06/images/E06/E0600269.html
Measured with a ruler, I get around 300 meters across, so that checks out with ZM's numbers. Local time is 14.70, so the shadows are right for a mound also, and not a ditch.
This three sided mound has sharp, straight edges and apparenly flat sides, so it definately looks artifiical, much more so than the D&M. My only caution would be that resolution of the image is only fair at 5.73 m/p, so I would make any conclusions contingient on better imaging. But it looks promising. Here's Wil's mound enhanced a little more with a histogram adjustment.
Neil
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18 years 3 months ago #16315
by emanuel
Replied by emanuel on topic Reply from Emanuel Sferios
This is, I think, a much better candidate for artificiality than any of the faces.
Emanuel
Emanuel
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- Larry Burford
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18 years 3 months ago #9052
by Larry Burford
Replied by Larry Burford on topic Reply from Larry Burford
I second emanuel's observation.
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