Origin of saddle dolomite in Aqra-Bekhma formation (Upper Campanain-Mastrichtian)‎, Bekhma gorge area, North Iraq

الملخص EN

Thirty-four dolomite and dolomitic limestone samples were collected from Aqra – Bekhma (It is difficult to separate the two formations as they are intervening) Formation in Bekhma Gorge area near Shaqlawa in northern Iraq.

Alizarin red - s was used to distinguish calcite from dolomite.

The saddle dolomite was recognized as a virtually rough crystalline material with milky-white or rosy color when seen in outcrop.

In addition, we observed a pearl luster and a characteristically marred crystal building that is, in principle, described as damaged crystal faces with cleavage planes, while microscopically it appeared as a widespread extinction.

The crystal faces, although well advanced, are frequently pavement-like facets.