Finishing work in and around Seitah, sols 238-378 |
Finishing work in and around Seitah, sols 238-378 |
Nov 18 2021, 06:25 PM
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#46
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Member Group: Members Posts: 705 Joined: 3-December 04 From: Boulder, Colorado, USA Member No.: 117 |
Looks like there may be some ripple structures preserved in the rock in that image.
John |
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Nov 19 2021, 12:56 AM
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#47
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Member Group: Members Posts: 153 Joined: 8-February 04 From: Phoenix, AZ USA Member No.: 9 |
Looks like there may be some ripple structures preserved in the rock in that image. I see what you are talking about, at some of the bed boundaries. There is also a fallen piece that has a bedding plane exposed with what could be small 3D dunes or ripples (can't quite determine the scale). They both are not pleasingly preserved, at least from here, so we'll have to wait and see. We've been seeing distinct bed boundaries for a while, in several places along the traverse, at several stratigraphic intervals. None of them looked completely planar, but there were no obvious ripple forms either, let alone cross-stratification within the beds. After finally determining that the grain size was in the medium-coarse to granule range, that's not surprising. Maybe the grain size is smaller in these outcrops, and ripples and dunes could have formed during the flows. -------------------- Tim Demko
BioLink site |
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Nov 19 2021, 08:23 PM
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#48
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Member Group: Members Posts: 282 Joined: 18-June 04 Member No.: 84 |
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Nov 19 2021, 08:46 PM
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#49
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Member Group: Members Posts: 705 Joined: 3-December 04 From: Boulder, Colorado, USA Member No.: 117 |
This post. Specifically the wavy bedding planes left of center, and the funky-looking slab surface on the slope just lower right of center.
John |
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Nov 20 2021, 12:59 PM
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#50
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Member Group: Members Posts: 790 Joined: 9-May 21 From: Germany Member No.: 9017 |
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Nov 20 2021, 08:10 PM
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#51
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Member Group: Members Posts: 790 Joined: 9-May 21 From: Germany Member No.: 9017 |
I see what you are talking about, at some of the bed boundaries. There is also a fallen piece that has a bedding plane exposed with what could be small 3D dunes or ripples (can't quite determine the scale). . . . Regarding the scale, here is a sol 265 Mastcam-Z context panorama for the sol 265 SuperCam detail image (bluish rectangle to the right), and a HiRISE map of the panorama's field of view. The target taken by the SuperCam is circled on the map. It is almost exactly 200 m away from the rover. With some calculations it came out that the visible distance between the suspected ripple crests is about 9 to 10 cm in the SuperCam detail image (see previous post). |
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Nov 24 2021, 06:44 PM
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#52
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Solar System Cartographer Group: Members Posts: 10226 Joined: 5-April 05 From: Canada Member No.: 227 |
A second drill hole and sample just done at Brac.
https://mars.nasa.gov/mars2020-raw-images/p..._0LLJ01_800.jpg 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 PDF: 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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Nov 24 2021, 08:50 PM
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#53
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Member Group: Members Posts: 819 Joined: 3-June 04 From: Brittany, France Member No.: 79 |
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Nov 26 2021, 12:31 AM
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#54
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Solar System Cartographer Group: Members Posts: 10226 Joined: 5-April 05 From: Canada Member No.: 227 |
I have collected and labelled images of the various sampling (and related activities) sites with the names as I know them so far. I don't yet have a name for the most recent sample hole. All images are oriented roughly north-up, not in raw image orientation.
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 PDF: 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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Nov 26 2021, 05:00 PM
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#55
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Senior Member Group: Members Posts: 1089 Joined: 19-February 05 From: Close to Meudon Observatory in France Member No.: 172 |
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Nov 26 2021, 05:03 PM
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#56
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Senior Member Group: Members Posts: 1089 Joined: 19-February 05 From: Close to Meudon Observatory in France Member No.: 172 |
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Nov 27 2021, 01:46 AM
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#57
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Senior Member Group: Members Posts: 2431 Joined: 30-January 13 From: Penang, Malaysia. Member No.: 6853 |
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Nov 27 2021, 07:23 AM
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#58
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Senior Member Group: Members Posts: 1089 Joined: 19-February 05 From: Close to Meudon Observatory in France Member No.: 172 |
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Nov 28 2021, 05:22 PM
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#59
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Member Group: Members Posts: 790 Joined: 9-May 21 From: Germany Member No.: 9017 |
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Nov 29 2021, 02:18 PM
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#60
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Senior Member Group: Members Posts: 1075 Joined: 21-September 07 From: Québec, Canada Member No.: 3908 |
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