Abstract

The area of the study is at Lahej Governorate, Yemen, which is about 110 km to the north from Aden.
Limestone deposits at the study area belongs to Amran Group of Jurassic Age. Three main formations composed Amran Group; Lower: Shugrah Formation, Middle: Madbi Formation and Upper:Nayfa Formation. Nayfa Formation is characterized by thickly bedded and massive limestones of which having between them  ahigh quality, interestingly pure thick limestone, atdepths from nearly 40 m to75m, which is studied early by the National Company of Cement (NCC), at the areas ofWadi Faltah,Wadi Nakhleen and between Ar-Raqah and Wadi Asaq. These limestones are classified as high and very high pure limestones according to the results of chemical analysis, the spatial contour maps of percentages of CaCO₃ and CaO attributes. Limestone is considered as raw materials for proper industries. Accordingly, the limestones could be used for glass manufacture. High and very high limestone is the suitable for Soda ash manufacturing, for iron and steel industry.