Exploring the Greenheugh Pediment, Sols 3387-3871, 16 Feb 2022-1 Jul 2023 |
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Exploring the Greenheugh Pediment, Sols 3387-3871, 16 Feb 2022-1 Jul 2023 |
 Mar 29 2023, 08:38 PM
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#826
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 Member  Group: Members Posts: 823 Joined: 9-September 17 From: UK Member No.: 8241  |
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Mar 30 2023, 06:14 PM
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#827
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Member Group: Members Posts: 823 Joined: 9-September 17 From: UK Member No.: 8241 |
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Mar 30 2023, 07:07 PM
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#828
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Solar System Cartographer Group: Members Posts: 10153 Joined: 5-April 05 From: Canada Member No.: 227 |
Jan's panorama for sol 3783 in circular form.
Phil
-------------------- ... because the Solar System ain't gonna map itself.
Also to be found posting similar content on https://mastodon.social/@PhilStooke Maps for download (free PD: https://upload.wikimedia.org/wikipedia/comm...Cartography.pdf NOTE: everything created by me which I post on UMSF is considered to be in the public domain (NOT CC, public domain) |
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Apr 1 2023, 05:39 PM
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#829
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 Senior Member Group: Members Posts: 1629 Joined: 5-March 05 From: Boulder, CO Member No.: 184 |
We can see the drives climbing further southward up the valley, using official mosaics between Sols 3778 and 3783.
Longer stepable drive animation with a combination of official and Jan's mosaics from Sol 3435 to the present. -------------------- Steve [ my home page and planetary maps page ]
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Apr 1 2023, 05:53 PM
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#830
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Member Group: Members Posts: 823 Joined: 9-September 17 From: UK Member No.: 8241 |
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Apr 4 2023, 01:36 PM
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#831
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Senior Member Group: Members Posts: 1074 Joined: 21-September 07 From: Québec, Canada Member No.: 3908 |
Sol 3786 Lmastcam:
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Apr 7 2023, 09:55 PM
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#832
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Member Group: Members Posts: 823 Joined: 9-September 17 From: UK Member No.: 8241 |
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Apr 7 2023, 10:18 PM
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#833
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Member Group: Members Posts: 823 Joined: 9-September 17 From: UK Member No.: 8241 |
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Apr 8 2023, 02:43 PM
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#834
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 Member Group: Members Posts: 699 Joined: 3-December 04 From: Boulder, Colorado, USA Member No.: 117 |
Crazy weathering in the middle of Neville's image- even on Mars I've never seen anything quite like this. John |
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Apr 8 2023, 02:48 PM
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#835
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Junior Member Group: Members Posts: 27 Joined: 26-August 13 Member No.: 6994 |
As so many have said before, thank you for all these amazing images, Neville!
[D'oh. What john_s said.] In post #833, about 1/4 of the way in from the right edge and midway vertically (or about 70% of the way up in the 2nd-from right mosaic column) there's a rock with "spines" sticking out from a layer, with accompanying shadows. There are some lesser examples in rocks to its left. We've seen fantastically fragile-looking abraded lacework rocks before, but I don't recall an example with such nice periodic spacing--presumably some wind shadowing/resonance effect? Does it have any diagnostic value? |
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Apr 8 2023, 03:36 PM
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#836
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Member Group: Members Posts: 699 Joined: 3-December 04 From: Boulder, Colorado, USA Member No.: 117 |
I'll throw out one hypothesis for these spikes- parallel ripples in the sediments, with coarser or better-cemented grains accumulating in the troughs of the ripples. That could result in regularly-spaced parallel linear features in the sediment that are more wind-resistant. Add wind erosion roughly parallel to those features, so they protect themselves as the rest of the suface recedes, and you might get something like this. Or not.
John |
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Apr 8 2023, 03:41 PM
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#837
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 Senior Member Group: Members Posts: 4246 Joined: 17-January 05 Member No.: 152 |
The regularly spaced spikes in stereo. Anaglyph:
And cross-eyed:
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Apr 9 2023, 06:56 PM
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#838
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Senior Member Group: Members Posts: 2820 Joined: 22-April 05 From: Ridderkerk, Netherlands Member No.: 353 |
The Navcam R view on Sol 3793.
Jan van Driel
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Apr 11 2023, 01:35 PM
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#839
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Senior Member Group: Members Posts: 2820 Joined: 22-April 05 From: Ridderkerk, Netherlands Member No.: 353 |
The Mastcam L view on Sol 3786-3794.
Jan van Driel
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Apr 11 2023, 10:52 PM
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#840
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Senior Member Group: Members Posts: 4246 Joined: 17-January 05 Member No.: 152 |
Some RMI views of the spikes now:
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