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Here are two confirmations of the "Dome in Crater." They don't add much to the artificiality debate either way, but they should be noted. Though higher resolution than the original (M1501228), they are of poor quality image-wise. S0600723 was overexposed and requires high contrast and brightness adjustment to see it. R1901955 had sections blocked out as we have seen before in public request images of possible artifacts.

M15, south is up



S06, north up



R19, north up

Here is the tube in M1501228 again. This is one of the few sections of tube with a uniform structured appearance that in my opinion is a good candidate for artificiality. Following are some tubes, tube sections, or continuations of the same channels that are not quite tubes, which are found nearby.



This is the well known tube network discovered by Orme that shows apparently three separate tubes entering the ground.

E2101421


Crops of same feature.
M0400291 c1


M0400291 c2



Other nearby tubes.

S0602292


S0300125


S0300125 c3


S0300125 c1


M0201270


M0201270 c1


M0201270 c2


Two possible conclusions to be drawn (tentatively) from these images. First, none of the tubes have the uniform structure of M1501228. Second, we can see “tubes” trailing off to simple striations in the terrain, and then sometimes, to nothing but ground cover.

If readers/viewers are having trouble following my line of reasoning, I’ll state it again this way: There definitely do seem to be a few artificial looking tube-like structures, but most of the rest of the tubes don’t seem to be going anywhere, and trail off to “tubes” that don’t look like tubes at all, but do look like seif dunes, or striations in the valleys, channels, or troughs in which we find them, but not tubes. So if the “good tubes” are connected to these “dunes” how can they be part of some hypothetical tube-conduit system? The answer is they probably can’t.

On the other hand, some of the tubes look so darned uniform and structured that they seem very artificial.

Here’s M1500465 first found by Keill again. This is the most artificial appearing tube found so far, in my opinion. Note the two face-like structures on either end of it, but this post is not about faces so I’ll leave that alone.



Here is a confirmation of the same tube, R1102380.



Context of valley in which this tube is found; the above tube section is about half way down the image, M1500466.



Now here are other parts of the same valley system (i.e., "upstream" or "downstream" continuations of the same channel or valley found in the context image) in which the seif-like striations are found, but not tubes.

E1203458


E0101877


S0701338

<blockquote id="quote"><font size="2" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by neilderosa</i>
<br />Now here are other parts of the same valley system (i.e., "upstream" or "downstream" continuations of the same channel or valley found in the context image) in which the seif-like striations are found, but not tubes.<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">The other day I downloaded S0500932. What was striking to me is that most of the surface area is striated. It seems reasonable to me that they are natural and that whatever caused them also caused them on the tube-like structures. Maybe at a time when the tube-like structures were on flat surface, and then the sand-like material crusted, so that it's not loose sand any more. That would explain how they might be on vertical structures if Martian "Earth"quakes or impacts from meteors and the like caused the terrain to change, giving the appearance of having the tubes go vertical and underground.

Too many assumptions? I think not. Not when compared to the assumption that they are some sort of Martian Rapid Transit system.

I think the examples you've shown where a tube turns into a natural surface dune is an example of the "exception that proves the rule."

rd

<blockquote id="quote"><font size="2" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote">The other day I downloaded S0500932. What was striking to me is that most of the surface area is striated. It seems reasonable to me that they are natural and that whatever caused them also caused them on the tube-like structures. Maybe at a time when the tube-like structures were on flat surface, and then the sand-like material crusted, so that it's not loose sand any more. That would explain how they might be on vertical structures if Martian "earthquakes” or impacts from meteors and the like caused the terrain to change, giving the appearance of having the tubes go vertical and underground. [rd]<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">

Very possible.

<blockquote id="quote"><font size="2" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote">I think the examples you've shown where a tube turns into a natural surface dune is an example of the "exception that proves the rule.<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">

It may be.

<blockquote id="quote"><font size="2" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote">Too many assumptions? I think not. Not when compared to the assumption that they are some sort of Martian Rapid Transit system.<hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">

I’ll ignore the insult, directed at whomever, and just say this: If a “Martian Rapid Transit system,” or any other type of ruin of a conduit system was supported by compelling evidence, I would believe it. In this case, I don’t think it is. But in saying so, I do not rule out all artificiality of the tubes-like structures; we should try to distinuish the good evidence from the not soo good.

Neil

<blockquote id="quote"><font size="2" face="Verdana, Arial, Helvetica" id="quote">quote:<hr height="1" noshade id="quote"><i>Originally posted by neilderosa</i>
<br />I’ll ignore the insult, directed at whomever, and just say this: <hr height="1" noshade id="quote"></blockquote id="quote"></font id="quote">Insult? I think most reasonable people would agree that the notion that there's a natural explanation for the "tubes" is far less assumption-bound then the idea they are a Martian rapid transit system.

rd