Distribution Patterns of Large Martian Craters 
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Martian Landforms Distribution  Patterns
Cochise College- Mars Landforms

Mars Explored

Roger Weller, geology instructor ( wellerr@cochise.edu  )
last edited:  6/5/15

types of features in this study
Mars has more than 1300 craters whose diameters are in excess of 50 kilometers. 
Diagrams showing the extent of these craters can provide a valuable insight into the
geological history of Mars.


diameter-100 kilometers
latitude:    -32.387                longitude:    -35.853


diameter-77 kilometers
latitude:    52.262                longitude:    -64.625


diameter-90.5 kilometers
latitude:    12.981                longitude:    -174.564

planetary distribution of large Martian craters

The arrangement of large, unaltered areas on Mars can be described as a uniform,
random distribution.

4 views of the large craters on Mars
 0 degrees longitude

90 degrees East longitude

 180 degrees longitude

90 degrees West longitude

4 views showing the limits of distribution of the large craters
outlined limits- 0 degrees longitude

outlined limits- 90 degrees West longitude


     outlined limits- 180 degrees longitude

outlined limits- 90 degrees West longitude


Dichotomy between northern and southern hemispheres

     True dichotomy is not at the North Geographic Pole, but is located at 155.5 degrees
West longitude and 60.6 degrees North latitude.

Similarly, the maximum hemispheric concentration of large craters is centered on the
opposite side of the planet at 24.8 degrees East longitude and 60.6 degrees South

The regions of minimal occurrence of large craters are also the
areas dominated by volcanism
Note: The volcano symbols represent paterae, montes, and tholi.
 Tharsis Region

Elysium region

 Hadriacus region

Pityusa-Sisyphis region


There are also areas devoid of large craters in the polar regions,
probably due glacial erosion.
South Polar Region