Differentiation of Kawagarh and Lockhart Formation and Demarcation of Cretaceous - Tertiary (K-T) Boundary at Nizampur, Khyber Pakhtunkhwa, Pakistan (P-0980) (MFN 5788)

Abstract

Khawre Khwar Nizampur is located in the north-west of deformed Kala-Chitta Range. The study area is highly deformed and has undergone different phases of deformations. The rocks exposed in the area have age range from Jurassic to Paleocene. Kawagarh Formation (Cretaceous) and Lockhart Formation (Paleocene) are emphasized regarding thin section study of the collected samples from both the formations show mostly the biostratigraphic assemblage. These formations have faulted contact in the area. Kawagarh Formation is overlying the Lockhart Formation. By this deformation different types of folds can be easily observed. Main focus of the study is Demarcation of Cretaceous-Tertiary (K-T) boundary, studying the diagenetic features and their depositional environments, planktonic foraminifera are observed which includes Heterohelix reussi, Uniserial and Biserial Foraminifera in Kawagarh Formation and in Lockhart Formation, larger benthic foraminifera are observed which includes Lockhartia, Operculina, Miscellanea and Actinosiphon. These microfossil assemblages help to identify depositional environments of outer neritic for Kawagarh Formation and inner neritic for Lockhart Formation. Diagenetic features of both formations are more or less similar but dolomitization in Kawagarh Formation and nodulartity in Lockhart Formation separated them from each other.