MICROFACIES ANALYSIS OF GHAR FORMATION (WESTERN DESERT OF IRAQ)

  • Sadi Kan Jan Iraq Natural History Research Center and Museum, University of Baghdad, Baghdad, Iraq
  • Aqeel A. Al-Zubaidi Iraq Natural History Research Center and Museum, University of Baghdad, Baghdad, Iraq

Abstract

Ghar Formation outcrop at the Iraqi western desert was studied by microfacies analysis
of (13) thin sections collected from wadi Al-Ratgha ( west of Qaim ) . According to
petrographic com position and organisms content ,rocks were subdivided into (4)
microfacies units :bioclastic wackestone , mudstone , miliolids wackestone , and grainstone
with aggregate grains microfacies .Microfacies units reflect shallow marine environment of
low circulation of very warm water at the middle part . The lower and middle part
interbedded with quite open marine environment below the wave base . The upper part was
deposited at shallow marine environment of low circulation . The main diagenetic processes
were the transformation ( type of neomorphism) and precipitation of calcite in the fractures
and fossil chambers .

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Published
2004-07-01
Section
Articles