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Beyond Lewis and Clark Gap, Sol 4482- (September 2, 2016-)
marsophile
post May 5 2017, 04:55 PM
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It's unlikely to be ice now, but there may have been ice there sometime in the past. Note the potential remnant of a melt area to the west of the feature.
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David Caso
post May 6 2017, 12:27 AM
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My very first post.

I am wondering. Why there is no talk of going upstream, west, of Perseverance Valley, for a bit.


If I were there, I'd check out that wash - upper stream bed source first very carefully, before committing myself to going over a thousand foot edge.

From what I can tell by the most basic Google Mars, the upper stream bed starts at a very small crater no more than a couple 100m west of the edge.

Add that new crater towards SW, and those bright white ring craters further on. A football field away or two all of them.
.

It just seems like there is not going to be an inspection of the headwaters, before going over the falls.



Been here every day, since 2009. Just now speaking up. This is the best website ever!

. . . . . . . Caso


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serpens
post May 6 2017, 12:33 AM
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Opportunity has accumulated a decades worth of wavelength / albedo correlations encompassing sedimentary deposits, dust and Endeavour's Noachian deposits. I suspect that they have a pretty good idea as to the composition of the Winnemucca bright area. Given the environment we can be certain that it is not CO2 or water ice.
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David Caso
post May 6 2017, 12:36 AM
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My very first post.

I am wondering. Why there is no talk of going upstream, west, of Perseverance Valley, for a bit.


If I were there, I'd check out that wash - upper stream bed source, first very carefully, before committing myself to going over a thousand foot edge.

From what I can tell by the most basic Google Mars, the upper stream bed starts at a very small crater no more than a couple 100m west of the edge.

Add that new crater towards SW, and those bright white ring craters further on. A couple football field away or three all of them.
.

It just seems like there is not going to be an inspection of the headwaters, before going over the falls.



Been here every day, since 2009. Just now speaking up. This is the best website ever!

. . . . . . . Caso
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marsophile
post May 6 2017, 02:43 AM
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The TPS report also says this:

QUOTE
Nicknamed Winnemucca, the MER scientists considered sending the rover to check it out. But Perseverance Valley is the objective and winter is coming. Instead, the scientists are examining Winnemucca with ground imagery, remote sensing, and an orbital mineralogical detector.


So we can at least hope for some additional remote data on this interesting feature.


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fredk
post May 6 2017, 03:15 PM
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More Phobos transits on 4720 and 4721. These are easier to see in the public jpegs because there's a dimmer internal reflection of the sun that isn't clipped:
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jvandriel
post May 6 2017, 06:03 PM
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The Navcam L0 view on Sol 4720-4721.

Jan van Driel


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Phil Stooke
post May 6 2017, 06:55 PM
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"My very first post.

I am wondering. Why there is no talk of going upstream, west, of Perseverance Valley, for a bit. "


Hi David - the little valley is thought to be very old, certainly if it was formed by water. So the real headwaters, if there were any on the surface, would have been buried by the 'Burns Formation' sandstones (as we saw in Victoria crater and all through those plains), and if not then certainly buried under the modern sand dunes (tsk - I mean ripples) which we see all over the plains west of the current position. And there might not have been headwaters as such anyway, the water could have flowed out of an aquifer where the crater wall cut through it, or it could have been fed by melting snow. So, probably nothing to see. Anyway, it seems they are eager to get into the valley after doing some stereo mapping.

Phil


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... because the Solar System ain't gonna map itself.
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Phil Stooke
post May 6 2017, 07:16 PM
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Jan's full panorama in circular form. Those linear rows of little stones are intriguing.

Phil

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... because the Solar System ain't gonna map itself.
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djellison
post May 7 2017, 05:56 AM
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QUOTE (jvandriel @ May 6 2017, 11:03 AM) *
The Navcam L0 view on Sol 4720-4721.

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These images are from my first solo shift as ECam Uplink lead on Opportunity. Sequences p1961, p1962 and p1963 were lovingly hand crafted.....I even dropped the center 3 frames a few degrees from the usual drive direction 5x1 pointing to get a little more valley in there.

I can't even begin to put into words how it feels to go from founding this place 13 years ago, to working at JPL 7 years ago, to starting ECAM on MSL last year, and now on Opportunity this weeks.

It's one hell of a journey, in many many ways

wheel.gif wheel.gif wheel.gif
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nprev
post May 7 2017, 06:08 AM
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Indeed it has been. Superb work, Doug. smile.gif wheel.gif wheel.gif wheel.gif


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A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
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charborob
post May 8 2017, 10:01 AM
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Sol 4723 Lpancam view:
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jvandriel
post May 8 2017, 06:47 PM
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The Pancam L2 view on Sol 4722-4723.

Jan van Driel

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Sean
post May 15 2017, 06:27 PM
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MER Sol 4730 NL



Quick & dirty hand stitch with extended sky and some wobbly exposure seam repair.



--------------------
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charborob
post May 16 2017, 07:06 PM
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Sol 4731 Lpancam:
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