Coesite from the Richat Dome, Mauritania: A Misidentification

  title={Coesite from the Richat Dome, Mauritania: A Misidentification},
  author={Robert F. Fudali},
  pages={228 - 230}
  • R. F. Fudali
  • Published 10 October 1969
  • Geology, Medicine
  • Science
The "shattered sandstone" from Richat reported to contain coesite is a tectonic breccia and probably represents a shear zone developed during the structural doming. An optical and x-ray examination of concentrates from this breccia demonstrated that the supposed x-ray reflections of coesite are actually due to barite, introduced into the permeable crushed zone by groundwater. 
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