Araej Fm
Type Locality and Naming
Column: Qatar, Upper Araej Mbr. Uwainat Mbr. Lower Araej Mbr.
Synonym:
Lithology and Thickness
Further divided into Upper Araej Mbr. Uwainat Mbr. Lower Araej Mbr. Olive, calcareous, clay shale interbedded with white chalky limestone. Cream limestone with subordinate shale. Cream to tan limestone, mainly soft, with subordinate marl and shale, and, several prominent brown oolite beds. Cream soft limestone capped by a bed of hard oolite. Cream compact limestone with several thin calcarenite beds in upper part. Cream dense lithographic limestone, passing down into softer partly calcarenitic limestone with interbedded shale. Olive-green and golden-brown, slightly gypsiferous shale, with a few thin chalky limestone layers. Fossils scarce, none identified. Interbedded white and cream, mainly chalky, limestone and golden-brown, slightly gypsiferous clay shale; several thin hard limestone layers in lower part. Green to olive, in part varicolored clay shale, with several thin layers of calcaernite and fine sandstone in the upper part; in some places several meters of bedded gypsum at the base.
Relationships and Distribution
Lower contact
Regionally, the schematic strat column indicates the next older unit as Marrat Fm
Upper contact
Regionally, the schematic strat column indicates the next younger unit as Tuwaiq Mountain Limestone Fm
Regional extent
GeoJSON
Fossils
Age
Depositional setting
Additional Information