2' The Palaeozoic outcrops of north

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2. The Palaeozoic outcrops of north Eastern
Desert
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• ABDALLAH EL-ADINDANI (1965) subdivided these
  rocks into three formations, from top to base
• - Aheimer Formation.
• - Abu Darag Formation, and
• - Rod El Hamal Formation.
• The three formations have unexposed bases and
  their exact superposition is therefore unknown.
  According to SAID EISSA (1969), these
  formations seem to be stratigraphically the same
  in spite of the variations of the foraminiferal
  faunal assemblage found in each. The exposures
  range in age from Late Carboniferous to Early
  Permian.

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• Rod El Hamal Formation
• (100-357 m, Carboniferous)
• It is best exposed at the junction of Wadi Araba
  and Wadi Rod El Hamal and is composed of the
  following mappable units "members"

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• Abu Darag Formation
• (40-178 m, Upper Carboniferous)
• The most complete section of the Abu Darag
  Formation is exposed at the core and southern
  flank of the Abu Darag anticlinal structure. In
  the northern and southern flanks, the formation
  is overlain by sandy and red beds (Qiseib
  Formation) which are intercalated with marine
  thin beds of green marls and yellow hard
  limestones of Permo-Triassic age.

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• Aheimer Formation
• (60-250m, Upper Carboniferous-Lower Permian)
• The type locality of this formation is at Wadi
  Aheimer about 10 kms south of Ain Sukhna. This
  formation could be subdivided into three members
  as follows (KORA MANSOUR 1992).

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• In the north Eastern Desert between Wadi Qena and
  Wadi Dakhel
• at the Southern Galala Plateau, Carboniferous
  strata are designated the Somr El-Qaa Formation
  (KLITZSCH 1990). This unit (40-60 m) most
  probably correlates with the Um Bogma and Abu
  Thora Formations of Sinai, but marine influence
  is less than at Sinai (KORA 1995).

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3. The Palaeozoic subsurface rocks in north
Western Desert A formal startigraphic
scheme was proposed by KEELEY (1989) for this
Palaeozoic succession. Two groups and seven
formations span the interval from the
Mid-Cambrian to the Early Permian. The resolution
between these superficially similar
clastic-dominated units is enhanced by the
use of palynostratigraphical zonation.
The Siwa Group (Mid-Cambrian-Late Silurian)i)
Shifa Formation (after the spring Ain Shifa at
Siwa)ii) Kohla Formation (after Kohla area,
north of Siwa)iii) Basur Formation (after the
type well El-Basur-1)
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• The Faghur Group (Devonian-Early Permian)
• Zeitoun Formation (after the type well Zeitoun-1)
• ii) Desouqy Formation (after the type well
  El-Desouqy-1
• iii) Dhiffah Formation (after the Dhiffah Plateau
  on the northern Libyan border)
• iv) Safi Formation (after the spring Ain es Safi
  at Siwa)

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