title: Coesite from the richat dome, mauritania: a misidentification.
abstract: 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.
authors.forename: R F
authors.initials: RF
authors.lastname: Fudali