Gebel Ahmar Sands Fm
    Period: 
    
  
  
      Neogene    
    
    Age Interval: 
    
  
  
       Rupelian - Chattian, Eg2
    
    Province: 
    
  
  
      Egypt general    
    Type Locality and Naming
Lithology and Thickness
Continental to fluviatile sands, flint, and gravel. Type section thickness appx. 50m. Sands and gravels are vividly colored. Fresh water snails.
    Lithology Pattern: 
    
   
  
  
      Coarse-grained sandstone
    
Relationships and Distribution
Lower contact
Regionally, the schematic strat column indicates the next older unit as Middle Calcareous Division Gr (Maadi Fm)
Upper contact
Regionally, the schematic strat column indicates the next younger unit as Moghra Fm
Regional extent
GeoJSON
      {"type":"Feature","geometry":{"type":"MultiPolygon","coordinates":[[[[31.86,29.75],[31.78,30.81],[29.94,31.06],[28.94,30.67],[26.09,31.46],[25.07,31.39],[25.15,30.59],[24.83,30.15],[25.2,29.03],[25.16,22.11],[33.41,22.08],[33.28,25.22],[32.94,25.99],[33.37,26.19],[32.5,26.85],[32.37,27.94],[31.8,28.33],[31.86,29.75]]]]}}    
    Fossils
Silicified wood and geyser plugs. Vertebrate remains with associated volcanic rocks.
Age
      Rupelian – Chattian    
    
     Age Span: 
    
          
    
  
  
        Beginning stage: 
    
  
  
      Rupelian    
    
        Fraction up in beginning stage: 
    
  
  
      0.0    
    
        Beginning date (Ma): 
    
  
  
      33.90    
    
        Ending stage: 
    
  
  
      Chattian    
    
        Fraction up in the ending stage: 
    
  
  
      1.0    
    
        Ending date (Ma):  
    
  
  
      23.04    
    Depositional setting
Continental to fluviatile
    Depositional pattern:  
    
      
    
   
  
Additional Information
    Compiler:  
    
  
      Said, R. The Geology of Egypt, 1962 pg. 19-20, 138.