PIA04170: Amazonis Yardangs

Amazonis Yardangs


26 August 2005
This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image shows yardangs -- a typical ridge pattern formed by wind erosion -- in southern Amazonis. Some time after the wind erosion occurred, conditions changed and, instead of erosion, the region experienced deposition by a relatively thin, uniform coating of dust. It is this coating of dust that gives the region a monotone appearance. Dark streaks occurring on slopes are formed by avalanching of the dry dust.

Location near : 10.1°N, 156.9°W
Image width : width: ~3 km (~1.9 mi)
Illumination from : lower left
Season : Northern Autumn

Cataloging Keywords:

Name Value Additional Values
Target Mars
System Mars
Target Type Planet
Mission Mars Global Surveyor (MGS)
Instrument Host Mars Global Surveyor (MGS)
Host Type Orbiter
Instrument Mars Orbiter Camera (MOC)
Extra Keywords Dust, Grayscale
Acquisition Date
Release Date 2005-08-26
Date in Caption 2005-08-26
Image Credit NASA/JPL/Malin Space Science Systems
Source photojournal.jpl.nasa.gov/catalog/PIA04170
Identifier PIA04170