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Gebel Ahmar Sands Formation
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Gebel Ahmar Sands Fm base reconstruction

Gebel Ahmar Sands Fm


Period: 
Neogene

Age Interval: 
Rupelian - Chattian, Eg2


Province: 
Egypt general

Type Locality and Naming

Column: Egypt general; Lowermost formation in Upper Clastic Division Gr

Synonym:


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.