Matrix is common in the sandstones of the Fat’ha Formation
(0–26%), whereas, it is rare in the sandstone of the Injana
Formation (0–6%) (Table 1). It occurs as crushed lithic grains,
small quartz grains and phyllosilicates (particularly sericite,
pseudomatrix). Pore-filling and patchy carbonates (sparry
calcite, micrite) are common cement type while cementation
by quartz is very rare, clayey-ferruginous and anhydrite
cements are observed in some samples.