Cochise College sponsored

              Mars- Mawrth Vallis  
Ripples in Dark-filled Crater "Lakes"
return to dunes
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     One of the most interesting features found within this high
resolution is the large number of shallow craters that are filled
with a fine-grained dark material.  At first glance these craters
resemble small lakes on Earth, complete with waves.  No other
area on Mars can compete with this large number of lake
look-alikes.  Winds in this area produce ripple dunes within
these craters.
 Example of ripples
photo source: Google Mars, USGS, JPL, University of Arizona

Other examples of ripples (7 views)
example 1
example 2
example 3
example 4
example 5
example 6
example 7
Source of photos: Google Mars with the original sources consisting of
United States Geological Survey, Jet Propulsion Laboratory,
and the University of Arizona.

 Also visit: Cochise College Mars Landforms , Mars Explored, 
Cochise College Geology Home Page
 Roger Weller, geology instructor (  last edited:  10/28/15