Martian Lava Flows
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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

Lobate lava flows are created when very fluid lavas overflow their
channels or issue from large fissures and then expand laterally.
These flows often cover large distances and may be compared with
flood lavas on Earth and the Moon.  The limiting edge of the flow often
has a sharp drop in height which allows it to be identified by low angle
lighting.

 
The edges of lobate lava flows stand out on high resolution photos of Mars
with low angle lighting.
 
Only about 40% of the photographic coverage of
Mars on GoogleEarth-Mars has the necessary high resolution to resolve
these features.  In spite of their light color, the Martian lavas closely
resemble the characteristics of basalt lava flows on Earth.

 
examples







click here for a larger photographic collection of Martian lava flows:  lava flows


planetary distribution of lobate lava flows
    
lava flows at 0 degrees longitude



   
 lava flows at 0 degrees longitude- schematic format


     lava flows at 180 degrees longitude



     lava flows at 180 degrees longitude- schematic format


There are two areas that have a maximum concentration
of lava flows

Maximum #1 at 113 degrees West longitude
 (Tharsis Region)




    Maximum #1 at 113 degrees West longitude-schematic format




    
Maximum #1- Tharsis Region with circled volcanoes



    
Maximum #1-Larger circles in Tharsis Region



 Maximum #1- Closer view of Alba Mons area



Maximum #1- Closer view of Alba Mons area in schematic format



  
Maximum #1- Closer view of the Ascreas Mons area with circular features outlined




Maximum #2 at 150 degrees West longitude
 (Elysium Region)




 Maximum #1 at 113 degrees West longitude-schematic format



     Maximum #2-Large circles in the Elysium Region



    
    
Maximum #2- Close view of Elysium Mons
with circled features




discussion