Crossing the Dunes at Murray Buttes, Sites 54-62, Sols 1353-1659, May 28 2016-Apr 6 2017 |
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Crossing the Dunes at Murray Buttes, Sites 54-62, Sols 1353-1659, May 28 2016-Apr 6 2017 |
 Dec 31 2016, 02:02 AM
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#826
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 Senior Member  Group: Members Posts: 4246 Joined: 17-January 05 Member No.: 152  |
Another crop:
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Jan 1 2017, 12:26 AM
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#827
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Senior Member Group: Members Posts: 4246 Joined: 17-January 05 Member No.: 152 |
It's been a while since we've seen anything in the navcam cloud sequences, but something's starting to show up now on 1565:
This is a bandpass-filtered average subtracted from each frame, then stretched and smoothed. |
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Jan 1 2017, 01:01 AM
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#828
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Senior Member Group: Members Posts: 2511 Joined: 13-September 05 Member No.: 497 |
QUOTE (nprev @ Dec 31 2016, 03:58 PM)  Let's please resume following this segment of Curiosity's journey... You make me nostalgic for the old days when Doug Ellison would come in and shut down these discussions...  -------------------- Disclaimer: This post is based on public information only. Any opinions are my own.
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Jan 1 2017, 09:42 AM
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#829
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 Senior Member Group: Members Posts: 2428 Joined: 30-January 13 From: Penang, Malaysia. Member No.: 6853 |
A couple of RMI mosaics to welcome in the new year (sol 1556) 1/1/17
Good to see the clouds again. Maybe the dust levels are reducing? |
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Jan 1 2017, 05:37 PM
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#830
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 Senior Member Group: Members Posts: 1628 Joined: 5-March 05 From: Boulder, CO Member No.: 184 |
QUOTE (mcaplinger @ Jan 1 2017, 01:01 AM) You make me nostalgic for the old days when Doug Ellison would come in and shut down these discussions... Would it be better for some of these posts to be shifted into this interesting thread? http://www.unmannedspaceflight.com/index.p...mp;#entry232435 -------------------- Steve [ my home page and planetary maps page ]
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Jan 1 2017, 06:49 PM
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#831
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 Merciless Robot Group: Admin Posts: 8783 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
Yes it would.
23 posts moved to Geomorphology of Gale Crater. -------------------- 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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Jan 2 2017, 07:45 AM
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#832
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Senior Member Group: Members Posts: 2428 Joined: 30-January 13 From: Penang, Malaysia. Member No.: 6853 |
Just one of a nice series of close-up 1566 MAHLIs (1/1/17) No processing. The one-centimeter scale bar is thanks to Gerald's MAHLI ruler
Link to raw images for 1566 |
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Jan 2 2017, 06:55 PM
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#833
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Senior Member Group: Members Posts: 4246 Joined: 17-January 05 Member No.: 152 |
Crop of the 1526-52 rlb series. This shows more travelling ripples and how the wheel track and debris from a moved rock are erased and overrun by the ripples:
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Jan 2 2017, 07:51 PM
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#834
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 Member Group: Members Posts: 334 Joined: 11-December 12 From: The home of Corby Crater (Corby-England) Member No.: 6783 |
An anaglyph from some of those 1566 Mahli close-ups.
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Jan 2 2017, 08:30 PM
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#835
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 Member Group: Members Posts: 684 Joined: 24-July 15 Member No.: 7619 |
QUOTE (algorithm @ Jan 2 2017, 07:51 PM) An anaglyph from some of those 1566 Mahli close-ups.
Very interesting how the rock to either side of the vertical veins stands in slightly higher relief... Seems as if either side of the veins is more resistant somehow? Interesting to compare this to the halos in sandstones. |
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Jan 3 2017, 03:54 AM
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#836
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Member Group: Members Posts: 384 Joined: 4-January 07 Member No.: 1555 |
QUOTE (PaulH51 @ Jan 2 2017, 12:45 AM) Just one of a nice series of close-up 1566 MAHLIs (1/1/17) No processing. The one-centimeter scale bar is thanks to Gerald's MAHLI ruler ... In this image, did anyone note upon all the little white spherules (diameter < 0.2 mm according to the scale bar) randomly embedded in the sediment? dburt |
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Jan 3 2017, 04:41 AM
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#837
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Senior Member Group: Members Posts: 2346 Joined: 7-December 12 Member No.: 6780 |
There seem to be several well-rounded sand grains distributed on the presumably hematite-rich rock, some of which with an olivine-like appearance, illuminated from the lower right, and casting a respective shadow to the upper left. The rock might be structured beyond the whitish veins, but I don't see obvious well-rounded embedded clasts.
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Jan 3 2017, 05:03 AM
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#838
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Senior Member Group: Members Posts: 1043 Joined: 17-February 09 Member No.: 4605 |
QUOTE (Gerald @ Jan 3 2017, 04:41 AM) ..... but I don't see obvious well-rounded embedded clasts. The white/clear spherules are evident and may well be of impact provenance. Perhaps deposited as an impact related airfall into water or through fluvial transportation. Could be glass converted or converting to clay. Pretty though and unusual. |
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Jan 3 2017, 05:44 AM
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#839
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Senior Member Group: Members Posts: 2346 Joined: 7-December 12 Member No.: 6780 |
To avoid confusion: Are you talking about grains like these? (rotated 90 degrees to reduce risk of optical illusion)
If so, those don't look like embedded to me, and may be wind-transported. Could be e.g. olivine, glass, impactite, or SiO2. We've seen (likely) olivine grains before in the dunes. Are there obviously embedded well-rounded bright translucent grains, hence evidently clasts or concretions of the rock? |
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Jan 3 2017, 10:19 AM
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#840
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Senior Member Group: Members Posts: 2428 Joined: 30-January 13 From: Penang, Malaysia. Member No.: 6853 |
Sol 1568 RMI mosaic. I see what appears to be small sections of exposed mineral filled fractures, also seeing erosion resistant bedrock next to some of the veins... However, we also appear to have a thin layer of material over the veins. Hopefully someone can enlighten me on how this may have occurred
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