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Figure 5. Elevation profiles of Grand Canyon 
2.5 Geomorphometric signature 
Hypsometric analysis (Figure 6) and calculation of the slope 
and aspect is performed in figure 8. 
  
140000 
120000 
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80000 
40000 
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Elevation (m) 
  
  
Figure 6. Elevation frequency histogram of the study area 
DEM and the relative hypsometric curve 
The geomorphometric data indicate that the Valles Marineris 
look more to an active tectonic zone of earth (Miliaresis and 
Kokkas, 2003) on the basis of its comparison to various tectonic 
zones of earth (Great Basin, Asia Minor and Zagros Ranges). 
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Figure 7. Rose-diagram of Grand Canyon.