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November 29 MRO Image Release, 13 New Images
ElkGroveDan
post Nov 29 2006, 08:29 PM
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Thanks to Sunspot for catching this

http://hiroc.lpl.arizona.edu/images/PSP/


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If Occam had heard my theory, things would be very different now.
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Rakhir
post Nov 30 2006, 08:28 AM
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Thanks Emily for all your posts.
I am really impressed by the gullies.

I've just a little question. If these gullies are created by avalanches of fluidized sand, why don't we see some build up of sand at the end ? huh.gif

-- Rakhir
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hendric
post Nov 30 2006, 03:24 PM
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QUOTE (Rakhir @ Nov 30 2006, 02:28 AM) *
Thanks Emily for all your posts.
I am really impressed by the gullies.

I've just a little question. If these gullies are created by avalanches of fluidized sand, why don't we see some build up of sand at the end ? huh.gif

-- Rakhir

Yeah, I don't see that either. To me, it almost looks like these gullies are growing by sapping rather than avalanches...

This picture shows what appears to be snow in the gullies, along with some depressions at the end. Maybe the snow melts causing short-living water that then seeps to the gully end, causing sapping from underneath making those sinkhole chains.

Attached Image


I don't see how a fluidized sand travelling downslope could cause features like this...

Attached Image


The walls of the gullies do look higher than the surroundings, almost like levees. Very bizarre!


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SteveM
post Nov 30 2006, 03:45 PM
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QUOTE (hendric @ Nov 30 2006, 10:24 AM) *
Yeah, I don't see that either. To me, it almost looks like these gullies are growing by sapping rather than avalanches...

This picture shows what appears to be snow in the gullies, along with some depressions at the end. Maybe the snow melts causing short-living water that then seeps to the gully end, causing sapping from underneath making those sinkhole chains.

You may be onto something in suggesting melting as part of the process; note GuyMac's comment on the HiRise blog that these gullies prefer the sun-facing side of the slopes:
QUOTE
PSP Image 1440-1255 shows a network of gully-like channels on the sides of dunes inside Russell Crater. On the sunward side, the channels are long and continuous, terminating at the base of the dunes. On the more shadowed side, strange stipples interrupt the otherwise silky smooth dune faces, as if the channel forming process never quite gets going.

Steve
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Posts in this topic
- ElkGroveDan   November 29 MRO Image Release   Nov 29 2006, 08:29 PM
- - tuvas   QUOTE (ElkGroveDan @ Nov 29 2006, 01:29 P...   Nov 29 2006, 08:34 PM
- - elakdawalla   Oh man...check out that Eberswalde image...I want ...   Nov 29 2006, 08:45 PM
|- - Sunspot   QUOTE (elakdawalla @ Nov 29 2006, 08:45 P...   Nov 29 2006, 08:59 PM
|- - Marz   QUOTE (elakdawalla @ Nov 29 2006, 02:45 P...   Nov 29 2006, 09:17 PM
|- - djellison   QUOTE (Marz @ Nov 29 2006, 09:17 PM) is i...   Nov 29 2006, 09:30 PM
- - odave   OK, I need the swear box for that Oppy image....an...   Nov 29 2006, 08:46 PM
- - djellison   Well - I'm giving a talk on MERB in Manchester...   Nov 29 2006, 08:48 PM
- - elakdawalla   I need the swear box for this fresh gullies image....   Nov 29 2006, 08:56 PM
|- - OWW   QUOTE (elakdawalla @ Nov 29 2006, 09:56 P...   Nov 29 2006, 09:02 PM
|- - ElkGroveDan   QUOTE (OWW @ Nov 29 2006, 01:02 PM) I dow...   Nov 29 2006, 09:06 PM
|- - elakdawalla   QUOTE (OWW @ Nov 29 2006, 01:02 PM) I dow...   Nov 29 2006, 09:14 PM
- - volcanopele   WOW!!! Even I'm impressed by some...   Nov 29 2006, 09:00 PM
- - djellison   I'll have to make a new Swear box for HiRISE.....   Nov 29 2006, 09:00 PM
|- - volcanopele   QUOTE (djellison @ Nov 29 2006, 02:00 PM)...   Nov 29 2006, 09:12 PM
- - lyford   *CLUNK* This last set made me convert my swear jar...   Nov 29 2006, 09:14 PM
- - OWW   I downloaded another: http://hiroc.lpl.arizona.edu...   Nov 29 2006, 09:37 PM
- - djellison   Using the www.fnordware.com JP2 plugin - I'm g...   Nov 29 2006, 09:46 PM
- - GuyMac   It is fixed now, but you'll have to re-downloa...   Nov 29 2006, 10:27 PM
- - elakdawalla   And thanks to you for the quick fix...else I'd...   Nov 29 2006, 10:35 PM
- - jabe   How about we pool all of our swear box money...   Nov 29 2006, 10:50 PM
- - elakdawalla   Comparing the browse version of the gullies image:...   Nov 29 2006, 10:51 PM
|- - AlexBlackwell   QUOTE (elakdawalla @ Nov 29 2006, 12:51 P...   Nov 29 2006, 11:10 PM
- - elakdawalla   OK, this is genius. A friend, Trent Hare from the...   Nov 29 2006, 11:12 PM
|- - odave   QUOTE (elakdawalla @ Nov 29 2006, 06:12 P...   Nov 30 2006, 12:00 AM
- - slinted   Here's a link to the OpenEV site for the googl...   Nov 29 2006, 11:19 PM
- - Sunspot   So who's going to take a shot at the ULTIMATE ...   Nov 29 2006, 11:51 PM
- - elakdawalla   Here's the Oppy landing site from the backshel...   Nov 30 2006, 12:05 AM
|- - ustrax   QUOTE (elakdawalla @ Nov 30 2006, 12:05 A...   Nov 30 2006, 11:12 AM
- - Sunspot   WOW......... Thanks for posting these Emily   Nov 30 2006, 12:15 AM
- - Phil Stooke   The tracks are not very visible, but where they ar...   Nov 30 2006, 12:18 AM
- - djellison   Stretch the hell out of it and you can eve see som...   Nov 30 2006, 12:22 AM
|- - MarkL   QUOTE (djellison @ Nov 30 2006, 12:22 AM)...   Nov 30 2006, 02:34 PM
- - Sunspot   I have a request to anyone that has the full size ...   Nov 30 2006, 12:38 AM
- - elakdawalla   OK, I've clipped out chunks of the Opportunity...   Nov 30 2006, 12:39 AM
|- - ElkGroveDan   Wow (again) clink clink. You can see still see th...   Nov 30 2006, 12:43 AM
|- - lyford   QUOTE (elakdawalla @ Nov 29 2006, 04:39 P...   Nov 30 2006, 02:22 AM
|- - OWW   QUOTE (elakdawalla @ Nov 30 2006, 01:39 A...   Nov 30 2006, 05:56 PM
- - elakdawalla   ...and a flicker gif of Opportunity... --Emily   Nov 30 2006, 12:55 AM
|- - dilo   Thanks, Emily. Your croppings are really useful an...   Nov 30 2006, 07:09 AM
- - Sunspot   Anatolia Fault, Sol 72, NavCam http://marsrovers....   Nov 30 2006, 01:22 AM
|- - dvandorn   QUOTE (Sunspot @ Nov 29 2006, 08:22 PM) A...   Nov 30 2006, 03:41 AM
- - Bill Harris   Thanks, Emily. These MRO images, along with Phil...   Nov 30 2006, 05:17 AM
- - ElkGroveDan   OK I found Purgatory. Starting with Phil's ma...   Nov 30 2006, 05:18 AM
|- - tuvas   QUOTE (ElkGroveDan @ Nov 29 2006, 10:18 P...   Nov 30 2006, 05:30 AM
- - Rakhir   Thanks Emily for all your posts. I am really impre...   Nov 30 2006, 08:28 AM
|- - hendric   QUOTE (Rakhir @ Nov 30 2006, 02:28 AM) Th...   Nov 30 2006, 03:24 PM
|- - Steve   QUOTE (hendric @ Nov 30 2006, 10:24 AM) Y...   Nov 30 2006, 03:45 PM
|- - ustrax   I'm working on a "Flight over Eagle Crate...   Nov 30 2006, 04:24 PM
|- - bgarlick   QUOTE (Steve @ Nov 30 2006, 08:45 AM) You...   Nov 30 2006, 04:27 PM
||- - Rakhir   QUOTE (bgarlick @ Nov 30 2006, 07:27 PM) ...   Nov 30 2006, 09:43 PM
|- - AlexBlackwell   QUOTE (Steve @ Nov 30 2006, 05:45 AM) You...   Nov 30 2006, 05:37 PM
- - djellison   I can't tell if I got them the right way aroun...   Nov 30 2006, 10:44 AM
|- - Floyd   QUOTE (djellison @ Nov 30 2006, 05:44 AM)...   Nov 30 2006, 02:10 PM
|- - ngunn   QUOTE (djellison @ Nov 30 2006, 10:44 AM)...   Nov 30 2006, 04:29 PM
- - Tman   Yeah, you've done a great service! Thank y...   Nov 30 2006, 01:09 PM
- - RedSky   Quote: "Over the next couple of weeks, the c...   Nov 30 2006, 01:18 PM
|- - djellison   QUOTE (RedSky @ Nov 30 2006, 01:18 PM) It...   Nov 30 2006, 01:50 PM
- - AlexBlackwell   Of the 13 PSP images that were released, I haven...   Nov 30 2006, 05:50 PM
|- - lyford   QUOTE (AlexBlackwell @ Nov 30 2006, 09:50...   Nov 30 2006, 10:17 PM
|- - AlexBlackwell   QUOTE (lyford @ Nov 30 2006, 12:17 PM) I ...   Nov 30 2006, 10:59 PM
- - djellison   If you have a bit of 'faith' you can ident...   Nov 30 2006, 06:17 PM
- - climber   You leave a few days and everything has changed. A...   Nov 30 2006, 09:24 PM
- - Nix   This new batch of images is so overwhelming. I kno...   Nov 30 2006, 10:36 PM
- - elakdawalla   Has anybody else managed to download the Eberswald...   Dec 1 2006, 02:47 AM
|- - RichardLeis   QUOTE (elakdawalla @ Nov 30 2006, 07:47 P...   Dec 1 2006, 03:32 AM
|- - tuvas   QUOTE (RichardLeis @ Nov 30 2006, 08:32 P...   Dec 1 2006, 03:42 AM
|- - RichardLeis   QUOTE (tuvas @ Nov 30 2006, 08:42 PM) As ...   Dec 1 2006, 03:58 AM
|- - tuvas   QUOTE (RichardLeis @ Nov 30 2006, 08:58 P...   Dec 1 2006, 04:04 AM
- - jamescanvin   Have you noticed that on the download page that th...   Dec 1 2006, 03:10 AM
- - CosmicRocker   QUOTE (Sunspot @ Nov 29 2006, 06:38 PM) I...   Dec 1 2006, 06:09 AM
|- - Sunspot   Cool, thanks CosmicRocker. I see its just a crat...   Dec 1 2006, 10:21 AM
- - kenny   I have just woken up to find all this utterly wond...   Dec 1 2006, 10:31 AM
- - djellison   The backshell confused me as well. I've spoke...   Dec 1 2006, 11:39 AM
- - kenny   And on the new images ... Backshell to Endurance? ...   Dec 1 2006, 04:18 PM
- - Decepticon   WOW! Has anyone colored that yet?   Dec 1 2006, 05:51 PM
|- - djellison   QUOTE (Decepticon @ Dec 1 2006, 05:51 PM)...   Dec 1 2006, 06:32 PM
- - Sym05   Something wrong today with the "Mars Explorat...   Dec 2 2006, 06:49 PM
|- - RichardLeis   QUOTE (Sym05 @ Dec 2 2006, 11:49 AM) Some...   Dec 3 2006, 01:09 AM
|- - Sym05   Richard, I'm sorry. Looking at the entire im...   Dec 3 2006, 07:12 AM
- - deglr6328   Amazing amazing stuff. Still my fav must-check log...   Dec 2 2006, 11:16 PM
- - Tman   The Lion-King-Pano from Oppy and the Eagle-Crater-...   Dec 3 2006, 10:09 AM

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