Friday, April 16, 2010

Martian Gullies

Posted By on Fri, Apr 16, 2010 at 10:02 AM

PSP_002291_1335.jpg
  • NASA/JPL/University of Arizona

More new images from the UA Lunar and Planetary Lab's HiRISE camera aboard the Mars Reconnaissance Orbiter are up.

HiRISE team member Ginny Gulick tells us:

This observation shows the complex, gullied western wall of a kilometer-deep impact crater in the Terra Sirenum region. This is an interesting crater because it appears to be mantled by the fluidized ejecta blanket of a slightly smaller crater just to the West.

A diverse set of gullies originate at multiple elevations along

the crater wall. Prominent gullies have incised through the overlying ejecta into the upper walls to reveal numerous resistant dark layers. The floors of these gullies display a host of interesting features, including braided middle reaches, cut banks, channel bars, and stream terracing. These are all features suggestive of water flow.

Miniature gully systems, less than a kilometer long, start much further downslope than the larger gullies yet display the usual gully attributes, including theater-headed alcove source regions, incised middle reaches, and overlapping alluvial fans at their lower reaches. Detailed studies of these and other gully systems should help to elucidate the gully formation mechanisms.

Comments

Subscribe to this thread:

Add a comment

More by Jim Nintzel

  • Editor's Note

    Giving Thanks
    • Nov 23, 2017
  • Editor's Note

    Pulp Fiction
    • Nov 16, 2017
  • The Skinny

    The stampede of Republican lawmakers retreating in horror from Alabama Senate candidate Roy Moore is quite the spectacle.
    • Nov 16, 2017
  • More »
Today | Sun | Mon | Tue | Wed | Thu | Fri
Burlesque Fitness

Burlesque Fitness @ Floor Polish

Mondays, Wednesdays, 4:30-5:30 p.m.

All of today's events | Staff Picks

Staff Pick

Carnival of Illusion: Magic, Mystery & Oooh La La!

This top-rated illusion show is "Revitalizing Magic" by blending an international travel theme with all the charms… More

@ Scottish Rite Grand Parlour Saturdays. Continues through April 14 160 South Scott Ave

» More Picks

Submit an Event Listing

Popular Content

  1. Laughing Stock: The People's Pervert Does Christmas (The Range: The Tucson Weekly's Daily Dispatch)
  2. The 'Freedom Center's' High School Course Is On Shaky Ground at TUSD (The Range: The Tucson Weekly's Daily Dispatch)
  3. Cutting Teacher Compensation and School Funding in Wisconsin (The Range: The Tucson Weekly's Daily Dispatch)
  4. Steve Bannon Beats the Drum Against Undocumented Immigrants in Tucson Appearance (The Range: The Tucson Weekly's Daily Dispatch)
  5. Grease Trap Fever! County Collecting Grease in January (The Range: The Tucson Weekly's Daily Dispatch)

© 2017 Tucson Weekly | 7225 Mona Lisa Rd. Ste. 125, Tucson AZ 85741 | (520) 797-4384 | Powered by Foundation