Talus
Pleistocene red breccia. Occurrence and origin, Sohag area, Egypt
Ramadan K. Bekir
Geology Dept., Sohag, Fac. Sciences, South Valley Univ., Egypt. |
The red breccia of Sohag area is a massive sedimentary rock of economic importance. It has
attractive colors relative to other Egyptian breccias. The rock occurs as unstratified
lenticular lithosome covering Pleistocene sediments, Issawia Formation. The rock is
composed of unsorted limestone fragments cemented by iron stained calcite.
On basis of field observations, petrographic and mineral studies, the red breccia has
characteristics of talus accumulate rock type of monogenetic source, locally derived from
the limestone plateau. The formation of the rock was accomplished through three successive
stages: Talus accumulation, matrix infiltration and iron stain cementation. The rock has
some secondary voids of different sizes, due to simple dissolution by occasional rain.
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