Petrology of the Bibai Volcanics, NE Baluchistan
Abstract
Throughout northeastern Baluchistan, the upper part of the Cretaceous Parh Formation contains evidence of volcanic activity in this region. Near Kach, northeast of Quetta a thick succession of Late Cretaceous volcanic rocks, referred to as Bibai volcanics may be seen. It is mainly composed of basaltic lavas at the base, followed by a thick succession of agglomerates, tuffs and volcanic ash that are interbedded with sand stone and conglomerates. The volcanics are interpreted to represent an island arc formed in the Zagros-Chitral convergence zone developed as a consequence of the, northward drift of the Indian plate.
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