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

Previously in the Range

More by Jim Nintzel

  • Editor's Note

    Smoke Signals
    • Apr 19, 2018
  • The Skinny

    Downtown Tucson scored a big win last week when Gov. Doug Ducey signed legislation extending the life of the Rio Nuevo district for an extra decade.
    • Apr 12, 2018
  • Editor's Note

    Get Your Fest On
    • Apr 12, 2018
  • More »
Today | Wed | Thu | Fri | Sat | Sun | Mon
PiYo Strength Class

PiYo Strength Class @ Floor Polish

Thursdays, 4:30-5:30 p.m.

All of today's events | Staff Picks

Staff Pick

Tucson International Mariachi Conference

The Tucson International Mariachi Conference was created to pass mariachi traditions to the next generation. 4/26 @… More

@ AVA: Anselmo Valencia Tori Amphitheater Thu., April 26, 6-8 p.m., Fri., April 27, 7-9 p.m. and Sat., April 28, 11 a.m.-11 p.m. Casino del Sol, 5655 W. Valencia Road.

» More Picks

Submit an Event Listing

Popular Content

  1. The Strike Is On: Arizona Teachers Prepared for Walkout Next Week (The Range: The Tucson Weekly's Daily Dispatch)
  2. Antigone Books To Be Sold to Three Employees (If They Can Raise Some More Cash) (The Range: The Tucson Weekly's Daily Dispatch)
  3. Interview with a Robot (The Range: The Tucson Weekly's Daily Dispatch)
  4. A Partial List Of UA Freedom Center's Funders (The Range: The Tucson Weekly's Daily Dispatch)
  5. Zona Politics with Jim Nintzel: Talking with City Councilman Steve Kozachik (The Range: The Tucson Weekly's Daily Dispatch)

© 2018 Tucson Weekly | 7225 Mona Lisa Rd. Ste. 125, Tucson AZ 85741 | (520) 797-4384 | Powered by Foundation