Study of Planktonic Foraminifera from the Cretaceous-Paleogene Boundary in Khuzdar District, Balochistan

• Main Authors: P. A. USMANI, I. A. BROHI, R. A. LASHARI, H. NAZ
• Format: Article in Journal/Newspaper
• Language: English
• Published: Faculty of Natural Science, University of Sindh Jamshoro 2011
• Subjects: Cretaceous – Tertiary boundary; Maastrichtian Pab Sandstone; Planktonic foraminifera
• Online Access: https://sujo.usindh.edu.pk/index.php/SURJ/article/view/6053; https://doi.org/10.26692/surj-ss.v43i2.6053

he study of Planktonic foraminifera in relation to the Cretaceous – Paleogene boundary in Khuzdar district, Baluchistan, Pakistan have been carried out based on examination of material from three section of Cretaceous - Paleogene sequence, named: - (1) PAK. Section (2) MG. Section (3) HR. Section The focus yielded is typical Cretaceous - Early Tertiary Planktonic Foraminifera such as Globotruncana contusa, Globotruncana stuarti, Globotruncana ventricosa, Globotruncana arca, Recemiguembelina fructicosa, Pseudoguemblina elagans and appearance of Parasubbotina pseudobulloides in Danian of PAK. Section. In MG. and HR. Section the presence of Parasubbotina pseudobulloides, Morzovella aequa, Morozovella acuta, Hantkenina dumblie, Globigerina lozanoi, Globigerina pseudovenezuela and Ghagni the zone marker of Paleocene to Late Eocene and also presence of Globigerina taupemsis, Dentaglobigerina carpulenta, zone marker Oligocene strata in MG. and HR. Section. The age of the redefined Jamburo Group ranges from the Mastrichitian to the Middle Oligocene. The Cretaceous –Paleogene boundary is determine above the Pab sandstone and base of the Jamburo Group in PAK. Section and below the gray breciated limestone in MG. Section, where as in HR. Section it is located between limestone and shale of the Jamburo Group.