The Cretaceous Goru Formation, Central Indus Basin, Sulaiman Range, contains diverse and well-preserved planktonic foraminifera. Thirty-three planktonic foraminifera species belonging to ten genera, have been identified from both isolated specimens and thin sections. The foraminiferal biozones of the pelagic carbonates in the Goru Formation include the Thalmanninella reicheli Total Range Zone (middle Cenomanian), Rotalipora cushmani Total Range Zone (late middle to latest Cenomanian), Whiteinella archaeocretacea Interval Zone (latest Cenomanian to earliest Turonian), Helvetoglobotruncana helvetica Total Range Zone (late early Turonian to late middle Turonian), Dicarinella primitiva-Marginotruncana sigali Partial Range Zone (latest middle Turonian to late Turonian), Dicarinella concavata Interval Zone (late Turonian to late Coniacian), and Dicarinella asymetrica Total Range Zone (latest Coniacian to Santonian). Based on the identified planktonic foraminifera, the biozones of the Goru Formation exposed in the Poi section are correlated with the standard zonation scheme of the Tethys domains and assigned an age of middle Cenomanian to late Santonian.
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